Updated: 2021/Apr/14


TMUX(1)                     General Commands Manual                    TMUX(1)

NAME
     tmux - terminal multiplexer

SYNOPSIS
     tmux [-2CDluvV] [-c shell-command] [-f file] [-L socket-name]
          [-S socket-path] [-T features] [command [flags]]

DESCRIPTION
     tmux is a terminal multiplexer: it enables a number of terminals to be
     created, accessed, and controlled from a single screen.  tmux may be
     detached from a screen and continue running in the background, then later
     reattached.

     When tmux is started it creates a new session with a single window and
     displays it on screen.  A status line at the bottom of the screen shows
     information on the current session and is used to enter interactive
     commands.

     A session is a single collection of pseudo terminals under the management
     of tmux.  Each session has one or more windows linked to it.  A window
     occupies the entire screen and may be split into rectangular panes, each
     of which is a separate pseudo terminal (the pty(4) manual page documents
     the technical details of pseudo terminals).  Any number of tmux instances
     may connect to the same session, and any number of windows may be present
     in the same session.  Once all sessions are killed, tmux exits.

     Each session is persistent and will survive accidental disconnection
     (such as ssh(1) connection timeout) or intentional detaching (with the
     `C-b d' key strokes).  tmux may be reattached using:

           $ tmux attach

     In tmux, a session is displayed on screen by a client and all sessions
     are managed by a single server.  The server and each client are separate
     processes which communicate through a socket in /tmp.

     The options are as follows:

     -2            Force tmux to assume the terminal supports 256 colours.
                   This is equivalent to -T 256.

     -C            Start in control mode (see the CONTROL MODE section).
                   Given twice (-CC) disables echo.

     -c shell-command
                   Execute shell-command using the default shell.  If
                   necessary, the tmux server will be started to retrieve the
                   default-shell option.  This option is for compatibility
                   with sh(1) when tmux is used as a login shell.

     -D            Do not start the tmux server as a daemon.  This also turns
                   the exit-empty option off.  With -D, command may not be
                   specified.

     -f file       Specify an alternative configuration file.  By default,
                   tmux loads the system configuration file from
                   @SYSCONFDIR@/tmux.conf, if present, then looks for a user
                   configuration file at ~/.tmux.conf.

                   The configuration file is a set of tmux commands which are
                   executed in sequence when the server is first started.
                   tmux loads configuration files once when the server process
                   has started.  The source-file command may be used to load a
                   file later.

                   tmux shows any error messages from commands in
                   configuration files in the first session created, and
                   continues to process the rest of the configuration file.

     -L socket-name
                   tmux stores the server socket in a directory under
                   TMUX_TMPDIR or /tmp if it is unset.  The default socket is
                   named default.  This option allows a different socket name
                   to be specified, allowing several independent tmux servers
                   to be run.  Unlike -S a full path is not necessary: the
                   sockets are all created in a directory tmux-UID under the
                   directory given by TMUX_TMPDIR or in /tmp.  The tmux-UID
                   directory is created by tmux and must not be world
                   readable, writable or executable.

                   If the socket is accidentally removed, the SIGUSR1 signal
                   may be sent to the tmux server process to recreate it (note
                   that this will fail if any parent directories are missing).

     -l            Behave as a login shell.  This flag currently has no effect
                   and is for compatibility with other shells when using tmux
                   as a login shell.

     -N            Do not start the server even if the command would normally
                   do so (for example new-session or start-server).

     -S socket-path
                   Specify a full alternative path to the server socket.  If
                   -S is specified, the default socket directory is not used
                   and any -L flag is ignored.

     -u            Write UTF-8 output to the terminal even if the first
                   environment variable of LC_ALL, LC_CTYPE, or LANG that is
                   set does not contain "UTF-8" or "UTF8".  This is equivalent
                   to -T UTF-8.

     -T features   Set terminal features for the client.  This is a comma-
                   separated list of features.  See the terminal-features
                   option.

     -v            Request verbose logging.  Log messages will be saved into
                   tmux-client-PID.log and tmux-server-PID.log files in the
                   current directory, where PID is the PID of the server or
                   client process.  If -v is specified twice, an additional
                   tmux-out-PID.log file is generated with a copy of
                   everything tmux writes to the terminal.

                   The SIGUSR2 signal may be sent to the tmux server process
                   to toggle logging between on (as if -v was given) and off.

     -V            Report the tmux version.

     command [flags]
                   This specifies one of a set of commands used to control
                   tmux, as described in the following sections.  If no
                   commands are specified, the new-session command is assumed.

DEFAULT KEY BINDINGS
     tmux may be controlled from an attached client by using a key combination
     of a prefix key, `C-b' (Ctrl-b) by default, followed by a command key.

     The default command key bindings are:

           C-b         Send the prefix key (C-b) through to the application.
           C-o         Rotate the panes in the current window forwards.
           C-z         Suspend the tmux client.
           !           Break the current pane out of the window.
           "           Split the current pane into two, top and bottom.
           #           List all paste buffers.
           $           Rename the current session.
           %           Split the current pane into two, left and right.
           &           Kill the current window.
           '           Prompt for a window index to select.
           (           Switch the attached client to the previous session.
           )           Switch the attached client to the next session.
           ,           Rename the current window.
           -           Delete the most recently copied buffer of text.
           .           Prompt for an index to move the current window.
           0 to 9      Select windows 0 to 9.
           :           Enter the tmux command prompt.
           ;           Move to the previously active pane.
           =           Choose which buffer to paste interactively from a list.
           ?           List all key bindings.
           D           Choose a client to detach.
           L           Switch the attached client back to the last session.
           [           Enter copy mode to copy text or view the history.
           ]           Paste the most recently copied buffer of text.
           c           Create a new window.
           d           Detach the current client.
           f           Prompt to search for text in open windows.
           i           Display some information about the current window.
           l           Move to the previously selected window.
           m           Mark the current pane (see select-pane -m).
           M           Clear the marked pane.
           n           Change to the next window.
           o           Select the next pane in the current window.
           p           Change to the previous window.
           q           Briefly display pane indexes.
           r           Force redraw of the attached client.
           s           Select a new session for the attached client
                       interactively.
           t           Show the time.
           w           Choose the current window interactively.
           x           Kill the current pane.
           z           Toggle zoom state of the current pane.
           {           Swap the current pane with the previous pane.
           }           Swap the current pane with the next pane.
           ~           Show previous messages from tmux, if any.
           Page Up     Enter copy mode and scroll one page up.
           Up, Down
           Left, Right
                       Change to the pane above, below, to the left, or to the
                       right of the current pane.
           M-1 to M-5  Arrange panes in one of the five preset layouts: even-
                       horizontal, even-vertical, main-horizontal, main-
                       vertical, or tiled.
           Space       Arrange the current window in the next preset layout.
           M-n         Move to the next window with a bell or activity marker.
           M-o         Rotate the panes in the current window backwards.
           M-p         Move to the previous window with a bell or activity
                       marker.
           C-Up, C-Down
           C-Left, C-Right
                       Resize the current pane in steps of one cell.
           M-Up, M-Down
           M-Left, M-Right
                       Resize the current pane in steps of five cells.

     Key bindings may be changed with the bind-key and unbind-key commands.

COMMAND PARSING AND EXECUTION
     tmux supports a large number of commands which can be used to control its
     behaviour.  Each command is named and can accept zero or more flags and
     arguments.  They may be bound to a key with the bind-key command or run
     from the shell prompt, a shell script, a configuration file or the
     command prompt.  For example, the same set-option command run from the
     shell prompt, from ~/.tmux.conf and bound to a key may look like:

           $ tmux set-option -g status-style bg=cyan

           set-option -g status-style bg=cyan

           bind-key C set-option -g status-style bg=cyan

     Here, the command name is `set-option', `-g' is a flag and `status-style'
     and `bg=cyan' are arguments.

     tmux distinguishes between command parsing and execution.  In order to
     execute a command, tmux needs it to be split up into its name and
     arguments.  This is command parsing.  If a command is run from the shell,
     the shell parses it; from inside tmux or from a configuration file, tmux
     does.  Examples of when tmux parses commands are:

           -   in a configuration file;

           -   typed at the command prompt (see command-prompt);

           -   given to bind-key;

           -   passed as arguments to if-shell or confirm-before.

     To execute commands, each client has a `command queue'.  A global command
     queue not attached to any client is used on startup for configuration
     files like ~/.tmux.conf.  Parsed commands added to the queue are executed
     in order.  Some commands, like if-shell and confirm-before, parse their
     argument to create a new command which is inserted immediately after
     themselves.  This means that arguments can be parsed twice or more - once
     when the parent command (such as if-shell) is parsed and again when it
     parses and executes its command.  Commands like if-shell, run-shell and
     display-panes stop execution of subsequent commands on the queue until
     something happens - if-shell and run-shell until a shell command finishes
     and display-panes until a key is pressed.  For example, the following
     commands:

           new-session; new-window
           if-shell "true" "split-window"
           kill-session

     Will execute new-session, new-window, if-shell, the shell command
     true(1), split-window and kill-session in that order.

     The COMMANDS section lists the tmux commands and their arguments.

PARSING SYNTAX
     This section describes the syntax of commands parsed by tmux, for example
     in a configuration file or at the command prompt.  Note that when
     commands are entered into the shell, they are parsed by the shell - see
     for example ksh(1) or csh(1).

     Each command is terminated by a newline or a semicolon (;).  Commands
     separated by semicolons together form a `command sequence' - if a command
     in the sequence encounters an error, no subsequent commands are executed.

     It is recommended that a semicolon used as a command separator should be
     written as an individual token, for example from sh(1):

           $ tmux neww \; splitw

     Or:

           $ tmux neww ';' splitw

     Or from the tmux command prompt:

           neww ; splitw

     However, a trailing semicolon is also interpreted as a command separator,
     for example in these sh(1) commands:

           $ tmux neww\\; splitw

     Or:

           $ tmux 'neww;' splitw

     As in these examples, when running tmux from the shell extra care must be
     taken to properly quote semicolons:

           1.   Semicolons that should be interpreted as a command separator
                should be escaped according to the shell conventions.  For
                sh(1) this typically means quoted (such as `neww ';' splitw')
                or escaped (such as `neww \\\\; splitw').

           2.   Individual semicolons or trailing semicolons that should be
                interpreted as arguments should be escaped twice: once
                according to the shell conventions and a second time for tmux;
                for example:

                      $ tmux neww 'foo\\;' bar
                      $ tmux neww foo\\\\; bar

           3.   Semicolons that are not individual tokens or trailing another
                token should only be escaped once according to shell
                conventions; for example:

                      $ tmux neww 'foo-;-bar'
                      $ tmux neww foo-\\;-bar

     Comments are marked by the unquoted # character - any remaining text
     after a comment is ignored until the end of the line.

     If the last character of a line is \, the line is joined with the
     following line (the \ and the newline are completely removed).  This is
     called line continuation and applies both inside and outside quoted
     strings and in comments, but not inside braces.

     Command arguments may be specified as strings surrounded by single (')
     quotes, double quotes (") or braces ({}).  This is required when the
     argument contains any special character.  Single and double quoted
     strings cannot span multiple lines except with line continuation.  Braces
     can span multiple lines.

     Outside of quotes and inside double quotes, these replacements are
     performed:

           -   Environment variables preceded by $ are replaced with their
               value from the global environment (see the GLOBAL AND SESSION
               ENVIRONMENT section).

           -   A leading ~ or ~user is expanded to the home directory of the
               current or specified user.

           -   \uXXXX or \uXXXXXXXX is replaced by the Unicode codepoint
               corresponding to the given four or eight digit hexadecimal
               number.

           -   When preceded (escaped) by a \, the following characters are
               replaced: \e by the escape character; \r by a carriage return;
               \n by a newline; and \t by a tab.

           -   \ooo is replaced by a character of the octal value ooo.  Three
               octal digits are required, for example \001.  The largest valid
               character is \377.

           -   Any other characters preceded by \ are replaced by themselves
               (that is, the \ is removed) and are not treated as having any
               special meaning - so for example \; will not mark a command
               sequence and \$ will not expand an environment variable.

     Braces are parsed as a configuration file (so conditions such as `%if'
     are processed) and then converted into a string.  They are designed to
     avoid the need for additional escaping when passing a group of tmux
     commands as an argument (for example to if-shell).  These two examples
     produce an identical command - note that no escaping is needed when using
     {}:

           if-shell true {
               display -p 'brace-dollar-foo: }$foo'
           }

           if-shell true "display -p 'brace-dollar-foo: }\$foo'"

     Braces may be enclosed inside braces, for example:

           bind x if-shell "true" {
               if-shell "true" {
                   display "true!"
               }
           }

     Environment variables may be set by using the syntax `name=value', for
     example `HOME=/home/user'.  Variables set during parsing are added to the
     global environment.  A hidden variable may be set with `%hidden', for
     example:

           %hidden MYVAR=42

     Hidden variables are not passed to the environment of processes created
     by tmux.  See the GLOBAL AND SESSION ENVIRONMENT section.

     Commands may be parsed conditionally by surrounding them with `%if',
     `%elif', `%else' and `%endif'.  The argument to `%if' and `%elif' is
     expanded as a format (see FORMATS) and if it evaluates to false (zero or
     empty), subsequent text is ignored until the closing `%elif', `%else' or
     `%endif'.  For example:

           %if "#{==:#{host},myhost}"
           set -g status-style bg=red
           %elif "#{==:#{host},myotherhost}"
           set -g status-style bg=green
           %else
           set -g status-style bg=blue
           %endif

     Will change the status line to red if running on `myhost', green if
     running on `myotherhost', or blue if running on another host.
     Conditionals may be given on one line, for example:

           %if #{==:#{host},myhost} set -g status-style bg=red %endif

COMMANDS
     This section describes the commands supported by tmux.  Most commands
     accept the optional -t (and sometimes -s) argument with one of
     target-client, target-session, target-window, or target-pane.  These
     specify the client, session, window or pane which a command should
     affect.

     target-client should be the name of the client, typically the pty(4) file
     to which the client is connected, for example either of /dev/ttyp1 or
     ttyp1 for the client attached to /dev/ttyp1.  If no client is specified,
     tmux attempts to work out the client currently in use; if that fails, an
     error is reported.  Clients may be listed with the list-clients command.

     target-session is tried as, in order:

           1.   A session ID prefixed with a $.

           2.   An exact name of a session (as listed by the list-sessions
                command).

           3.   The start of a session name, for example `mysess' would match
                a session named `mysession'.

           4.   An fnmatch(3) pattern which is matched against the session
                name.

     If the session name is prefixed with an `=', only an exact match is
     accepted (so `=mysess' will only match exactly `mysess', not
     `mysession').

     If a single session is found, it is used as the target session; multiple
     matches produce an error.  If a session is omitted, the current session
     is used if available; if no current session is available, the most
     recently used is chosen.

     target-window (or src-window or dst-window) specifies a window in the
     form session:window.  session follows the same rules as for
     target-session, and window is looked for in order as:

           1.   A special token, listed below.

           2.   A window index, for example `mysession:1' is window 1 in
                session `mysession'.

           3.   A window ID, such as @1.

           4.   An exact window name, such as `mysession:mywindow'.

           5.   The start of a window name, such as `mysession:mywin'.

           6.   As an fnmatch(3) pattern matched against the window name.

     Like sessions, a `=' prefix will do an exact match only.  An empty window
     name specifies the next unused index if appropriate (for example the
     new-window and link-window commands) otherwise the current window in
     session is chosen.

     The following special tokens are available to indicate particular
     windows.  Each has a single-character alternative form.

     Token              Meaning
     {start}       ^    The lowest-numbered window
     {end}         $    The highest-numbered window
     {last}        !    The last (previously current) window
     {next}        +    The next window by number
     {previous}    -    The previous window by number

     target-pane (or src-pane or dst-pane) may be a pane ID or takes a similar
     form to target-window but with the optional addition of a period followed
     by a pane index or pane ID, for example: `mysession:mywindow.1'.  If the
     pane index is omitted, the currently active pane in the specified window
     is used.  The following special tokens are available for the pane index:

     Token                  Meaning
     {last}            !    The last (previously active) pane
     {next}            +    The next pane by number
     {previous}        -    The previous pane by number
     {top}                  The top pane
     {bottom}               The bottom pane
     {left}                 The leftmost pane
     {right}                The rightmost pane
     {top-left}             The top-left pane
     {top-right}            The top-right pane
     {bottom-left}          The bottom-left pane
     {bottom-right}         The bottom-right pane
     {up-of}                The pane above the active pane
     {down-of}              The pane below the active pane
     {left-of}              The pane to the left of the active pane
     {right-of}             The pane to the right of the active pane

     The tokens `+' and `-' may be followed by an offset, for example:

           select-window -t:+2

     In addition, target-session, target-window or target-pane may consist
     entirely of the token `{mouse}' (alternative form `=') to specify the
     session, window or pane where the most recent mouse event occurred (see
     the MOUSE SUPPORT section) or `{marked}' (alternative form `~') to
     specify the marked pane (see select-pane -m).

     Sessions, window and panes are each numbered with a unique ID; session
     IDs are prefixed with a `$', windows with a `@', and panes with a `%'.
     These are unique and are unchanged for the life of the session, window or
     pane in the tmux server.  The pane ID is passed to the child process of
     the pane in the TMUX_PANE environment variable.  IDs may be displayed
     using the `session_id', `window_id', or `pane_id' formats (see the
     FORMATS section) and the display-message, list-sessions, list-windows or
     list-panes commands.

     shell-command arguments are sh(1) commands.  This may be a single
     argument passed to the shell, for example:

           new-window 'vi ~/.tmux.conf'

     Will run:

           /bin/sh -c 'vi ~/.tmux.conf'

     Additionally, the new-window, new-session, split-window, respawn-window
     and respawn-pane commands allow shell-command to be given as multiple
     arguments and executed directly (without `sh -c').  This can avoid issues
     with shell quoting.  For example:

           $ tmux new-window vi ~/.tmux.conf

     Will run vi(1) directly without invoking the shell.

     command [arguments] refers to a tmux command, either passed with the
     command and arguments separately, for example:

           bind-key F1 set-option status off

     Or passed as a single string argument in .tmux.conf, for example:

           bind-key F1 { set-option status off }

     Example tmux commands include:

           refresh-client -t/dev/ttyp2

           rename-session -tfirst newname

           set-option -wt:0 monitor-activity on

           new-window ; split-window -d

           bind-key R source-file ~/.tmux.conf \; \
                   display-message "source-file done"

     Or from sh(1):

           $ tmux kill-window -t :1

           $ tmux new-window \; split-window -d

           $ tmux new-session -d 'vi ~/.tmux.conf' \; split-window -d \; attach

CLIENTS AND SESSIONS
     The tmux server manages clients, sessions, windows and panes.  Clients
     are attached to sessions to interact with them, either when they are
     created with the new-session command, or later with the attach-session
     command.  Each session has one or more windows linked into it.  Windows
     may be linked to multiple sessions and are made up of one or more panes,
     each of which contains a pseudo terminal.  Commands for creating, linking
     and otherwise manipulating windows are covered in the WINDOWS AND PANES
     section.

     The following commands are available to manage clients and sessions:

     attach-session [-dErx] [-c working-directory] [-f flags] [-t
             target-session]
                   (alias: attach)
             If run from outside tmux, create a new client in the current
             terminal and attach it to target-session.  If used from inside,
             switch the current client.  If -d is specified, any other clients
             attached to the session are detached.  If -x is given, send
             SIGHUP to the parent process of the client as well as detaching
             the client, typically causing it to exit.  -f sets a comma-
             separated list of client flags.  The flags are:

             active-pane
                     the client has an independent active pane

             ignore-size
                     the client does not affect the size of other clients

             no-output
                     the client does not receive pane output in control mode

             pause-after=seconds
                     output is paused once the pane is seconds behind in
                     control mode

             read-only
                     the client is read-only

             wait-exit
                     wait for an empty line input before exiting in control
                     mode

             A leading `!' turns a flag off if the client is already attached.
             -r is an alias for -f read-only,ignore-size.  When a client is
             read-only, only keys bound to the detach-client or switch-client
             commands have any effect.  A client with the active-pane flag
             allows the active pane to be selected independently of the
             window's active pane used by clients without the flag.  This only
             affects the cursor position and commands issued from the client;
             other features such as hooks and styles continue to use the
             window's active pane.

             If no server is started, attach-session will attempt to start it;
             this will fail unless sessions are created in the configuration
             file.

             The target-session rules for attach-session are slightly
             adjusted: if tmux needs to select the most recently used session,
             it will prefer the most recently used unattached session.

             -c will set the session working directory (used for new windows)
             to working-directory.

             If -E is used, the update-environment option will not be applied.

     detach-client [-aP] [-E shell-command] [-s target-session] [-t
             target-client]
                   (alias: detach)
             Detach the current client if bound to a key, the client specified
             with -t, or all clients currently attached to the session
             specified by -s.  The -a option kills all but the client given
             with -t.  If -P is given, send SIGHUP to the parent process of
             the client, typically causing it to exit.  With -E, run
             shell-command to replace the client.

     has-session [-t target-session]
                   (alias: has)
             Report an error and exit with 1 if the specified session does not
             exist.  If it does exist, exit with 0.

     kill-server
             Kill the tmux server and clients and destroy all sessions.

     kill-session [-aC] [-t target-session]
             Destroy the given session, closing any windows linked to it and
             no other sessions, and detaching all clients attached to it.  If
             -a is given, all sessions but the specified one is killed.  The
             -C flag clears alerts (bell, activity, or silence) in all windows
             linked to the session.

     list-clients [-F format] [-t target-session]
                   (alias: lsc)
             List all clients attached to the server.  For the meaning of the
             -F flag, see the FORMATS section.  If target-session is
             specified, list only clients connected to that session.

     list-commands [-F format] [command]
                   (alias: lscm)
             List the syntax of command or - if omitted - of all commands
             supported by tmux.

     list-sessions [-F format] [-f filter]
                   (alias: ls)
             List all sessions managed by the server.  -F specifies the format
             of each line and -f a filter.  Only sessions for which the filter
             is true are shown.  See the FORMATS section.

     lock-client [-t target-client]
                   (alias: lockc)
             Lock target-client, see the lock-server command.

     lock-session [-t target-session]
                   (alias: locks)
             Lock all clients attached to target-session.

     new-session [-AdDEPX] [-c start-directory] [-e environment] [-f flags]
             [-F format] [-n window-name] [-s session-name] [-t group-name]
             [-x width] [-y height] [shell-command]
                   (alias: new)
             Create a new session with name session-name.

             The new session is attached to the current terminal unless -d is
             given.  window-name and shell-command are the name of and shell
             command to execute in the initial window.  With -d, the initial
             size comes from the global default-size option; -x and -y can be
             used to specify a different size.  `-' uses the size of the
             current client if any.  If -x or -y is given, the default-size
             option is set for the session.  -f sets a comma-separated list of
             client flags (see attach-session).

             If run from a terminal, any termios(4) special characters are
             saved and used for new windows in the new session.

             The -A flag makes new-session behave like attach-session if
             session-name already exists; in this case, -D behaves like -d to
             attach-session, and -X behaves like -x to attach-session.

             If -t is given, it specifies a session group.  Sessions in the
             same group share the same set of windows - new windows are linked
             to all sessions in the group and any windows closed removed from
             all sessions.  The current and previous window and any session
             options remain independent and any session in a group may be
             killed without affecting the others.  The group-name argument may
             be:

             1.      the name of an existing group, in which case the new
                     session is added to that group;

             2.      the name of an existing session - the new session is
                     added to the same group as that session, creating a new
                     group if necessary;

             3.      the name for a new group containing only the new session.

             -n and shell-command are invalid if -t is used.

             The -P option prints information about the new session after it
             has been created.  By default, it uses the format
             `#{session_name}:' but a different format may be specified with
             -F.

             If -E is used, the update-environment option will not be applied.
             -e takes the form `VARIABLE=value' and sets an environment
             variable for the newly created session; it may be specified
             multiple times.

     refresh-client [-cDlLRSU] [-A pane:state] [-B name:what:format] [-C XxY]
             [-f flags] [-t target-client] [adjustment]
                   (alias: refresh)
             Refresh the current client if bound to a key, or a single client
             if one is given with -t.  If -S is specified, only update the
             client's status line.

             The -U, -D, -L -R, and -c flags allow the visible portion of a
             window which is larger than the client to be changed.  -U moves
             the visible part up by adjustment rows and -D down, -L left by
             adjustment columns and -R right.  -c returns to tracking the
             cursor automatically.  If adjustment is omitted, 1 is used.  Note
             that the visible position is a property of the client not of the
             window, changing the current window in the attached session will
             reset it.

             -C sets the width and height of a control mode client.  -A allows
             a control mode client to trigger actions on a pane.  The argument
             is a pane ID (with leading `%'), a colon, then one of `on',
             `off', `continue' or `pause'.  If `off', tmux will not send
             output from the pane to the client and if all clients have turned
             the pane off, will stop reading from the pane.  If `continue',
             tmux will return to sending output to the pane if it was paused
             (manually or with the pause-after flag).  If `pause', tmux will
             pause the pane.  -A may be given multiple times for different
             panes.

             -B sets a subscription to a format for a control mode client.
             The argument is split into three items by colons: name is a name
             for the subscription; what is a type of item to subscribe to;
             format is the format.  After a subscription is added, changes to
             the format are reported with the %subscription-changed
             notification, at most once a second.  If only the name is given,
             the subscription is removed.  what may be empty to check the
             format only for the attached session, or one of: a pane ID such
             as `%0'; `%*' for all panes in the attached session; a window ID
             such as `@0'; or `@*' for all windows in the attached session.

             -f sets a comma-separated list of client flags, see
             attach-session.

             -l requests the clipboard from the client using the xterm(1)
             escape sequence and stores it in a new paste buffer.

             -L, -R, -U and -D move the visible portion of the window left,
             right, up or down by adjustment, if the window is larger than the
             client.  -c resets so that the position follows the cursor.  See
             the window-size option.

     rename-session [-t target-session] new-name
                   (alias: rename)
             Rename the session to new-name.

     show-messages [-JT] [-t target-client]
                   (alias: showmsgs)
             Show server messages or information.  Messages are stored, up to
             a maximum of the limit set by the message-limit server option.
             -J and -T show debugging information about jobs and terminals.

     source-file [-Fnqv] path ...
                   (alias: source)
             Execute commands from one or more files specified by path (which
             may be glob(7) patterns).  If -F is present, then path is
             expanded as a format.  If -q is given, no error will be returned
             if path does not exist.  With -n, the file is parsed but no
             commands are executed.  -v shows the parsed commands and line
             numbers if possible.

     start-server
                   (alias: start)
             Start the tmux server, if not already running, without creating
             any sessions.

             Note that as by default the tmux server will exit with no
             sessions, this is only useful if a session is created in
             ~/.tmux.conf, exit-empty is turned off, or another command is run
             as part of the same command sequence.  For example:

                   $ tmux start \; show -g

     suspend-client [-t target-client]
                   (alias: suspendc)
             Suspend a client by sending SIGTSTP (tty stop).

     switch-client [-ElnprZ] [-c target-client] [-t target-session] [-T
             key-table]
                   (alias: switchc)
             Switch the current session for client target-client to
             target-session.  As a special case, -t may refer to a pane (a
             target that contains `:', `.' or `%'), to change session, window
             and pane.  In that case, -Z keeps the window zoomed if it was
             zoomed.  If -l, -n or -p is used, the client is moved to the
             last, next or previous session respectively.  -r toggles the
             client read-only and ignore-size flags (see the attach-session
             command).

             If -E is used, update-environment option will not be applied.

             -T sets the client's key table; the next key from the client will
             be interpreted from key-table.  This may be used to configure
             multiple prefix keys, or to bind commands to sequences of keys.
             For example, to make typing `abc' run the list-keys command:

                   bind-key -Ttable2 c list-keys
                   bind-key -Ttable1 b switch-client -Ttable2
                   bind-key -Troot   a switch-client -Ttable1

WINDOWS AND PANES
     Each window displayed by tmux may be split into one or more panes; each
     pane takes up a certain area of the display and is a separate terminal.
     A window may be split into panes using the split-window command.  Windows
     may be split horizontally (with the -h flag) or vertically.  Panes may be
     resized with the resize-pane command (bound to `C-Up', `C-Down' `C-Left'
     and `C-Right' by default), the current pane may be changed with the
     select-pane command and the rotate-window and swap-pane commands may be
     used to swap panes without changing their position.  Panes are numbered
     beginning from zero in the order they are created.

     By default, a tmux pane permits direct access to the terminal contained
     in the pane.  A pane may also be put into one of several modes:

           -   Copy mode, which permits a section of a window or its history
               to be copied to a paste buffer for later insertion into another
               window.  This mode is entered with the copy-mode command, bound
               to `[' by default.  Copied text can be pasted with the
               paste-buffer command, bound to `]'.

           -   View mode, which is like copy mode but is entered when a
               command that produces output, such as list-keys, is executed
               from a key binding.

           -   Choose mode, which allows an item to be chosen from a list.
               This may be a client, a session or window or pane, or a buffer.
               This mode is entered with the choose-buffer, choose-client and
               choose-tree commands.

     In copy mode an indicator is displayed in the top-right corner of the
     pane with the current position and the number of lines in the history.

     Commands are sent to copy mode using the -X flag to the send-keys
     command.  When a key is pressed, copy mode automatically uses one of two
     key tables, depending on the mode-keys option: copy-mode for emacs, or
     copy-mode-vi for vi.  Key tables may be viewed with the list-keys
     command.

     The following commands are supported in copy mode:

           Command                                      vi              emacs
           append-selection
           append-selection-and-cancel                  A
           back-to-indentation                          ^               M-m
           begin-selection                              Space           C-Space
           bottom-line                                  L
           cancel                                       q               Escape
           clear-selection                              Escape          C-g
           copy-end-of-line [<prefix>]                  D               C-k
           copy-line [<prefix>]
           copy-pipe [<command>] [<prefix>]
           copy-pipe-no-clear [<command>] [<prefix>]
           copy-pipe-and-cancel [<command>] [<prefix>]
           copy-selection [<prefix>]
           copy-selection-no-clear [<prefix>]
           copy-selection-and-cancel [<prefix>]         Enter           M-w
           cursor-down                                  j               Down
           cursor-down-and-cancel
           cursor-left                                  h               Left
           cursor-right                                 l               Right
           cursor-up                                    k               Up
           end-of-line                                  $               C-e
           goto-line <line>                             :               g
           halfpage-down                                C-d             M-Down
           halfpage-down-and-cancel
           halfpage-up                                  C-u             M-Up
           history-bottom                               G               M->
           history-top                                  g               M-<
           jump-again                                   ;               ;
           jump-backward <to>                           F               F
           jump-forward <to>                            f               f
           jump-reverse                                 ,               ,
           jump-to-backward <to>                        T
           jump-to-forward <to>                         t
           jump-to-mark                                 M-x             M-x
           middle-line                                  M               M-r
           next-matching-bracket                        %               M-C-f
           next-paragraph                               }               M-}
           next-space                                   W
           next-space-end                               E
           next-word                                    w
           next-word-end                                e               M-f
           other-end                                    o
           page-down                                    C-f             PageDown
           page-down-and-cancel
           page-up                                      C-b             PageUp
           pipe [<command>] [<prefix>]
           pipe-no-clear [<command>] [<prefix>]
           pipe-and-cancel [<command>] [<prefix>]
           previous-matching-bracket                                    M-C-b
           previous-paragraph                           {               M-{
           previous-space                               B
           previous-word                                b               M-b
           rectangle-on
           rectangle-off
           rectangle-toggle                             v               R
           refresh-from-pane                            r               r
           scroll-down                                  C-e             C-Down
           scroll-down-and-cancel
           scroll-up                                    C-y             C-Up
           search-again                                 n               n
           search-backward <for>                        ?
           search-backward-incremental <for>                            C-r
           search-backward-text <for>
           search-forward <for>                         /
           search-forward-incremental <for>                             C-s
           search-forward-text <for>
           search-reverse                               N               N
           select-line                                  V
           select-word
           set-mark                                     X               X
           start-of-line                                0               C-a
           stop-selection
           top-line                                     H               M-R

     The search commands come in several varieties: `search-forward' and
     `search-backward' search for a regular expression; the `-text' variants
     search for a plain text string rather than a regular expression;
     `-incremental' perform an incremental search and expect to be used with
     the -i flag to the command-prompt command.  `search-again' repeats the
     last search and `search-reverse' does the same but reverses the direction
     (forward becomes backward and backward becomes forward).

     Copy commands may take an optional buffer prefix argument which is used
     to generate the buffer name (the default is `buffer' so buffers are named
     `buffer0', `buffer1' and so on).  Pipe commands take a command argument
     which is the command to which the selected text is piped.  `copy-pipe'
     variants also copy the selection.  The `-and-cancel' variants of some
     commands exit copy mode after they have completed (for copy commands) or
     when the cursor reaches the bottom (for scrolling commands).  `-no-clear'
     variants do not clear the selection.

     The next and previous word keys use space and the `-', `_' and `@'
     characters as word delimiters by default, but this can be adjusted by
     setting the word-separators session option.  Next word moves to the start
     of the next word, next word end to the end of the next word and previous
     word to the start of the previous word.  The three next and previous
     space keys work similarly but use a space alone as the word separator.

     The jump commands enable quick movement within a line.  For instance,
     typing `f' followed by `/' will move the cursor to the next `/' character
     on the current line.  A `;' will then jump to the next occurrence.

     Commands in copy mode may be prefaced by an optional repeat count.  With
     vi key bindings, a prefix is entered using the number keys; with emacs,
     the Alt (meta) key and a number begins prefix entry.

     The synopsis for the copy-mode command is:

     copy-mode [-eHMqu] [-s src-pane] [-t target-pane]
             Enter copy mode.  The -u option scrolls one page up.  -M begins a
             mouse drag (only valid if bound to a mouse key binding, see MOUSE
             SUPPORT).  -H hides the position indicator in the top right.  -q
             cancels copy mode and any other modes.  -s copies from src-pane
             instead of target-pane.

             -e specifies that scrolling to the bottom of the history (to the
             visible screen) should exit copy mode.  While in copy mode,
             pressing a key other than those used for scrolling will disable
             this behaviour.  This is intended to allow fast scrolling through
             a pane's history, for example with:

                   bind PageUp copy-mode -eu

     A number of preset arrangements of panes are available, these are called
     layouts.  These may be selected with the select-layout command or cycled
     with next-layout (bound to `Space' by default); once a layout is chosen,
     panes within it may be moved and resized as normal.

     The following layouts are supported:

     even-horizontal
             Panes are spread out evenly from left to right across the window.

     even-vertical
             Panes are spread evenly from top to bottom.

     main-horizontal
             A large (main) pane is shown at the top of the window and the
             remaining panes are spread from left to right in the leftover
             space at the bottom.  Use the main-pane-height window option to
             specify the height of the top pane.

     main-vertical
             Similar to main-horizontal but the large pane is placed on the
             left and the others spread from top to bottom along the right.
             See the main-pane-width window option.

     tiled   Panes are spread out as evenly as possible over the window in
             both rows and columns.

     In addition, select-layout may be used to apply a previously used layout
     - the list-windows command displays the layout of each window in a form
     suitable for use with select-layout.  For example:

           $ tmux list-windows
           0: ksh [159x48]
               layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0}
           $ tmux select-layout bb62,159x48,0,0{79x48,0,0,79x48,80,0}

     tmux automatically adjusts the size of the layout for the current window
     size.  Note that a layout cannot be applied to a window with more panes
     than that from which the layout was originally defined.

     Commands related to windows and panes are as follows:

     break-pane [-abdP] [-F format] [-n window-name] [-s src-pane] [-t
             dst-window]
                   (alias: breakp)
             Break src-pane off from its containing window to make it the only
             pane in dst-window.  With -a or -b, the window is moved to the
             next index after or before (existing windows are moved if
             necessary).  If -d is given, the new window does not become the
             current window.  The -P option prints information about the new
             window after it has been created.  By default, it uses the format
             `#{session_name}:#{window_index}.#{pane_index}' but a different
             format may be specified with -F.

     capture-pane [-aepPqCJN] [-b buffer-name] [-E end-line] [-S start-line]
             [-t target-pane]
                   (alias: capturep)
             Capture the contents of a pane.  If -p is given, the output goes
             to stdout, otherwise to the buffer specified with -b or a new
             buffer if omitted.  If -a is given, the alternate screen is used,
             and the history is not accessible.  If no alternate screen
             exists, an error will be returned unless -q is given.  If -e is
             given, the output includes escape sequences for text and
             background attributes.  -C also escapes non-printable characters
             as octal \xxx.  -N preserves trailing spaces at each line's end
             and -J preserves trailing spaces and joins any wrapped lines.  -P
             captures only any output that the pane has received that is the
             beginning of an as-yet incomplete escape sequence.

             -S and -E specify the starting and ending line numbers, zero is
             the first line of the visible pane and negative numbers are lines
             in the history.  `-' to -S is the start of the history and to -E
             the end of the visible pane.  The default is to capture only the
             visible contents of the pane.

     choose-client [-NrZ] [-F format] [-f filter] [-K key-format] [-O
             sort-order] [-t target-pane] [template]
             Put a pane into client mode, allowing a client to be selected
             interactively from a list.  Each client is shown on one line.  A
             shortcut key is shown on the left in brackets allowing for
             immediate choice, or the list may be navigated and an item chosen
             or otherwise manipulated using the keys below.  -Z zooms the
             pane.  The following keys may be used in client mode:

                   Key    Function
                   Enter  Choose selected client
                   Up     Select previous client
                   Down   Select next client
                   C-s    Search by name
                   n      Repeat last search
                   t      Toggle if client is tagged
                   T      Tag no clients
                   C-t    Tag all clients
                   d      Detach selected client
                   D      Detach tagged clients
                   x      Detach and HUP selected client
                   X      Detach and HUP tagged clients
                   z      Suspend selected client
                   Z      Suspend tagged clients
                   f      Enter a format to filter items
                   O      Change sort field
                   r      Reverse sort order
                   v      Toggle preview
                   q      Exit mode

             After a client is chosen, `%%' is replaced by the client name in
             template and the result executed as a command.  If template is
             not given, "detach-client -t '%%'" is used.

             -O specifies the initial sort field: one of `name', `size',
             `creation', or `activity'.  -r reverses the sort order.  -f
             specifies an initial filter: the filter is a format - if it
             evaluates to zero, the item in the list is not shown, otherwise
             it is shown.  If a filter would lead to an empty list, it is
             ignored.  -F specifies the format for each item in the list and
             -K a format for each shortcut key; both are evaluated once for
             each line.  -N starts without the preview.  This command works
             only if at least one client is attached.

     choose-tree [-GNrswZ] [-F format] [-f filter] [-K key-format] [-O
             sort-order] [-t target-pane] [template]
             Put a pane into tree mode, where a session, window or pane may be
             chosen interactively from a tree.  Each session, window or pane
             is shown on one line.  A shortcut key is shown on the left in
             brackets allowing for immediate choice, or the tree may be
             navigated and an item chosen or otherwise manipulated using the
             keys below.  -s starts with sessions collapsed and -w with
             windows collapsed.  -Z zooms the pane.  The following keys may be
             used in tree mode:

                   Key    Function
                   Enter  Choose selected item
                   Up     Select previous item
                   Down   Select next item
                   +      Expand selected item
                   -      Collapse selected item
                   M-+    Expand all items
                   M--    Collapse all items
                   x      Kill selected item
                   X      Kill tagged items
                   <      Scroll list of previews left
                   >      Scroll list of previews right
                   C-s    Search by name
                   m      Set the marked pane
                   M      Clear the marked pane
                   n      Repeat last search
                   t      Toggle if item is tagged
                   T      Tag no items
                   C-t    Tag all items
                   :      Run a command for each tagged item
                   f      Enter a format to filter items
                   H      Jump to the starting pane
                   O      Change sort field
                   r      Reverse sort order
                   v      Toggle preview
                   q      Exit mode

             After a session, window or pane is chosen, `%%' is replaced by
             the target in template and the result executed as a command.  If
             template is not given, "switch-client -t '%%'" is used.

             -O specifies the initial sort field: one of `index', `name', or
             `time'.  -r reverses the sort order.  -f specifies an initial
             filter: the filter is a format - if it evaluates to zero, the
             item in the list is not shown, otherwise it is shown.  If a
             filter would lead to an empty list, it is ignored.  -F specifies
             the format for each item in the tree and -K a format for each
             shortcut key; both are evaluated once for each line.  -N starts
             without the preview.  -G includes all sessions in any session
             groups in the tree rather than only the first.  This command
             works only if at least one client is attached.

     customize-mode [-NZ] [-F format] [-f filter] [-t target-pane] [template]
             Put a pane into customize mode, where options and key bindings
             may be browsed and modified from a list.  Option values in the
             list are shown for the active pane in the current window.  -Z
             zooms the pane.  The following keys may be used in customize
             mode:

                   Key    Function
                   Enter  Set pane, window, session or global option value
                   Up     Select previous item
                   Down   Select next item
                   +      Expand selected item
                   -      Collapse selected item
                   M-+    Expand all items
                   M--    Collapse all items
                   s      Set option value or key attribute
                   S      Set global option value
                   w      Set window option value, if option is for pane and
                          window
                   d      Set an option or key to the default
                   D      Set tagged options and tagged keys to the default
                   u      Unset an option (set to default value if global) or
                          unbind a key
                   U      Unset tagged options and unbind tagged keys
                   C-s    Search by name
                   n      Repeat last search
                   t      Toggle if item is tagged
                   T      Tag no items
                   C-t    Tag all items
                   f      Enter a format to filter items
                   v      Toggle option information
                   q      Exit mode

             -f specifies an initial filter: the filter is a format - if it
             evaluates to zero, the item in the list is not shown, otherwise
             it is shown.  If a filter would lead to an empty list, it is
             ignored.  -F specifies the format for each item in the tree.  -N
             starts without the option information.  This command works only
             if at least one client is attached.

     display-panes [-bN] [-d duration] [-t target-client] [template]
                   (alias: displayp)
             Display a visible indicator of each pane shown by target-client.
             See the display-panes-colour and display-panes-active-colour
             session options.  The indicator is closed when a key is pressed
             (unless -N is given) or duration milliseconds have passed.  If -d
             is not given, display-panes-time is used.  A duration of zero
             means the indicator stays until a key is pressed.  While the
             indicator is on screen, a pane may be chosen with the `0' to `9'
             keys, which will cause template to be executed as a command with
             `%%' substituted by the pane ID.  The default template is
             "select-pane -t '%%'".  With -b, other commands are not blocked
             from running until the indicator is closed.

     find-window [-iCNrTZ] [-t target-pane] match-string
                   (alias: findw)
             Search for a fnmatch(3) pattern or, with -r, regular expression
             match-string in window names, titles, and visible content (but
             not history).  The flags control matching behavior: -C matches
             only visible window contents, -N matches only the window name and
             -T matches only the window title.  -i makes the search ignore
             case.  The default is -CNT.  -Z zooms the pane.

             This command works only if at least one client is attached.

     join-pane [-bdfhv] [-l size] [-s src-pane] [-t dst-pane]
                   (alias: joinp)
             Like split-window, but instead of splitting dst-pane and creating
             a new pane, split it and move src-pane into the space.  This can
             be used to reverse break-pane.  The -b option causes src-pane to
             be joined to left of or above dst-pane.

             If -s is omitted and a marked pane is present (see select-pane
             -m), the marked pane is used rather than the current pane.

     kill-pane [-a] [-t target-pane]
                   (alias: killp)
             Destroy the given pane.  If no panes remain in the containing
             window, it is also destroyed.  The -a option kills all but the
             pane given with -t.

     kill-window [-a] [-t target-window]
                   (alias: killw)
             Kill the current window or the window at target-window, removing
             it from any sessions to which it is linked.  The -a option kills
             all but the window given with -t.

     last-pane [-deZ] [-t target-window]
                   (alias: lastp)
             Select the last (previously selected) pane.  -Z keeps the window
             zoomed if it was zoomed.  -e enables or -d disables input to the
             pane.

     last-window [-t target-session]
                   (alias: last)
             Select the last (previously selected) window.  If no
             target-session is specified, select the last window of the
             current session.

     link-window [-abdk] [-s src-window] [-t dst-window]
                   (alias: linkw)
             Link the window at src-window to the specified dst-window.  If
             dst-window is specified and no such window exists, the src-window
             is linked there.  With -a or -b the window is moved to the next
             index after or before dst-window (existing windows are moved if
             necessary).  If -k is given and dst-window exists, it is killed,
             otherwise an error is generated.  If -d is given, the newly
             linked window is not selected.

     list-panes [-as] [-F format] [-f filter] [-t target]
                   (alias: lsp)
             If -a is given, target is ignored and all panes on the server are
             listed.  If -s is given, target is a session (or the current
             session).  If neither is given, target is a window (or the
             current window).  -F specifies the format of each line and -f a
             filter.  Only panes for which the filter is true are shown.  See
             the FORMATS section.

     list-windows [-a] [-F format] [-f filter] [-t target-session]
                   (alias: lsw)
             If -a is given, list all windows on the server.  Otherwise, list
             windows in the current session or in target-session.  -F
             specifies the format of each line and -f a filter.  Only windows
             for which the filter is true are shown.  See the FORMATS section.

     move-pane [-bdfhv] [-l size] [-s src-pane] [-t dst-pane]
                   (alias: movep)
             Does the same as join-pane.

     move-window [-abrdk] [-s src-window] [-t dst-window]
                   (alias: movew)
             This is similar to link-window, except the window at src-window
             is moved to dst-window.  With -r, all windows in the session are
             renumbered in sequential order, respecting the base-index option.

     new-window [-abdkPS] [-c start-directory] [-e environment] [-F format]
             [-n window-name] [-t target-window] [shell-command]
                   (alias: neww)
             Create a new window.  With -a or -b, the new window is inserted
             at the next index after or before the specified target-window,
             moving windows up if necessary; otherwise target-window is the
             new window location.

             If -d is given, the session does not make the new window the
             current window.  target-window represents the window to be
             created; if the target already exists an error is shown, unless
             the -k flag is used, in which case it is destroyed.  If -S is
             given and a window named window-name already exists, it is
             selected (unless -d is also given in which case the command does
             nothing).

             shell-command is the command to execute.  If shell-command is not
             specified, the value of the default-command option is used.  -c
             specifies the working directory in which the new window is
             created.

             When the shell command completes, the window closes.  See the
             remain-on-exit option to change this behaviour.

             -e takes the form `VARIABLE=value' and sets an environment
             variable for the newly created window; it may be specified
             multiple times.

             The TERM environment variable must be set to `screen' or `tmux'
             for all programs running inside tmux.  New windows will
             automatically have `TERM=screen' added to their environment, but
             care must be taken not to reset this in shell start-up files or
             by the -e option.

             The -P option prints information about the new window after it
             has been created.  By default, it uses the format
             `#{session_name}:#{window_index}' but a different format may be
             specified with -F.

     next-layout [-t target-window]
                   (alias: nextl)
             Move a window to the next layout and rearrange the panes to fit.

     next-window [-a] [-t target-session]
                   (alias: next)
             Move to the next window in the session.  If -a is used, move to
             the next window with an alert.

     pipe-pane [-IOo] [-t target-pane] [shell-command]
                   (alias: pipep)
             Pipe output sent by the program in target-pane to a shell command
             or vice versa.  A pane may only be connected to one command at a
             time, any existing pipe is closed before shell-command is
             executed.  The shell-command string may contain the special
             character sequences supported by the status-left option.  If no
             shell-command is given, the current pipe (if any) is closed.

             -I and -O specify which of the shell-command output streams are
             connected to the pane: with -I stdout is connected (so anything
             shell-command prints is written to the pane as if it were typed);
             with -O stdin is connected (so any output in the pane is piped to
             shell-command).  Both may be used together and if neither are
             specified, -O is used.

             The -o option only opens a new pipe if no previous pipe exists,
             allowing a pipe to be toggled with a single key, for example:

                   bind-key C-p pipe-pane -o 'cat >>~/output.#I-#P'

     previous-layout [-t target-window]
                   (alias: prevl)
             Move to the previous layout in the session.

     previous-window [-a] [-t target-session]
                   (alias: prev)
             Move to the previous window in the session.  With -a, move to the
             previous window with an alert.

     rename-window [-t target-window] new-name
                   (alias: renamew)
             Rename the current window, or the window at target-window if
             specified, to new-name.

     resize-pane [-DLMRTUZ] [-t target-pane] [-x width] [-y height]
             [adjustment]
                   (alias: resizep)
             Resize a pane, up, down, left or right by adjustment with -U, -D,
             -L or -R, or to an absolute size with -x or -y.  The adjustment
             is given in lines or columns (the default is 1); -x and -y may be
             a given as a number of lines or columns or followed by `%' for a
             percentage of the window size (for example `-x 10%').  With -Z,
             the active pane is toggled between zoomed (occupying the whole of
             the window) and unzoomed (its normal position in the layout).

             -M begins mouse resizing (only valid if bound to a mouse key
             binding, see MOUSE SUPPORT).

             -T trims all lines below the current cursor position and moves
             lines out of the history to replace them.

     resize-window [-aADLRU] [-t target-window] [-x width] [-y height]
             [adjustment]
                   (alias: resizew)
             Resize a window, up, down, left or right by adjustment with -U,
             -D, -L or -R, or to an absolute size with -x or -y.  The
             adjustment is given in lines or cells (the default is 1).  -A
             sets the size of the largest session containing the window; -a
             the size of the smallest.  This command will automatically set
             window-size to manual in the window options.

     respawn-pane [-k] [-c start-directory] [-e environment] [-t target-pane]
             [shell-command]
                   (alias: respawnp)
             Reactivate a pane in which the command has exited (see the
             remain-on-exit window option).  If shell-command is not given,
             the command used when the pane was created or last respawned is
             executed.  The pane must be already inactive, unless -k is given,
             in which case any existing command is killed.  -c specifies a new
             working directory for the pane.  The -e option has the same
             meaning as for the new-window command.

     respawn-window [-k] [-c start-directory] [-e environment] [-t
             target-window] [shell-command]
                   (alias: respawnw)
             Reactivate a window in which the command has exited (see the
             remain-on-exit window option).  If shell-command is not given,
             the command used when the window was created or last respawned is
             executed.  The window must be already inactive, unless -k is
             given, in which case any existing command is killed.  -c
             specifies a new working directory for the window.  The -e option
             has the same meaning as for the new-window command.

     rotate-window [-DUZ] [-t target-window]
                   (alias: rotatew)
             Rotate the positions of the panes within a window, either upward
             (numerically lower) with -U or downward (numerically higher).  -Z
             keeps the window zoomed if it was zoomed.

     select-layout [-Enop] [-t target-pane] [layout-name]
                   (alias: selectl)
             Choose a specific layout for a window.  If layout-name is not
             given, the last preset layout used (if any) is reapplied.  -n and
             -p are equivalent to the next-layout and previous-layout
             commands.  -o applies the last set layout if possible (undoes the
             most recent layout change).  -E spreads the current pane and any
             panes next to it out evenly.

     select-pane [-DdeLlMmRUZ] [-T title] [-t target-pane]
                   (alias: selectp)
             Make pane target-pane the active pane in its window.  If one of
             -D, -L, -R, or -U is used, respectively the pane below, to the
             left, to the right, or above the target pane is used.  -Z keeps
             the window zoomed if it was zoomed.  -l is the same as using the
             last-pane command.  -e enables or -d disables input to the pane.
             -T sets the pane title.

             -m and -M are used to set and clear the marked pane.  There is
             one marked pane at a time, setting a new marked pane clears the
             last.  The marked pane is the default target for -s to join-pane,
             move-pane, swap-pane and swap-window.

     select-window [-lnpT] [-t target-window]
                   (alias: selectw)
             Select the window at target-window.  -l, -n and -p are equivalent
             to the last-window, next-window and previous-window commands.  If
             -T is given and the selected window is already the current
             window, the command behaves like last-window.

     split-window [-bdfhIvPZ] [-c start-directory] [-e environment] [-l size]
             [-t target-pane] [shell-command] [-F format]
                   (alias: splitw)
             Create a new pane by splitting target-pane: -h does a horizontal
             split and -v a vertical split; if neither is specified, -v is
             assumed.  The -l option specifies the size of the new pane in
             lines (for vertical split) or in columns (for horizontal split);
             size may be followed by `%' to specify a percentage of the
             available space.  The -b option causes the new pane to be created
             to the left of or above target-pane.  The -f option creates a new
             pane spanning the full window height (with -h) or full window
             width (with -v), instead of splitting the active pane.  -Z zooms
             if the window is not zoomed, or keeps it zoomed if already
             zoomed.

             An empty shell-command ('') will create a pane with no command
             running in it.  Output can be sent to such a pane with the
             display-message command.  The -I flag (if shell-command is not
             specified or empty) will create an empty pane and forward any
             output from stdin to it.  For example:

                   $ make 2>&1|tmux splitw -dI &

             All other options have the same meaning as for the new-window
             command.

     swap-pane [-dDUZ] [-s src-pane] [-t dst-pane]
                   (alias: swapp)
             Swap two panes.  If -U is used and no source pane is specified
             with -s, dst-pane is swapped with the previous pane (before it
             numerically); -D swaps with the next pane (after it numerically).
             -d instructs tmux not to change the active pane and -Z keeps the
             window zoomed if it was zoomed.

             If -s is omitted and a marked pane is present (see select-pane
             -m), the marked pane is used rather than the current pane.

     swap-window [-d] [-s src-window] [-t dst-window]
                   (alias: swapw)
             This is similar to link-window, except the source and destination
             windows are swapped.  It is an error if no window exists at
             src-window.  If -d is given, the new window does not become the
             current window.

             If -s is omitted and a marked pane is present (see select-pane
             -m), the window containing the marked pane is used rather than
             the current window.

     unlink-window [-k] [-t target-window]
                   (alias: unlinkw)
             Unlink target-window.  Unless -k is given, a window may be
             unlinked only if it is linked to multiple sessions - windows may
             not be linked to no sessions; if -k is specified and the window
             is linked to only one session, it is unlinked and destroyed.

KEY BINDINGS
     tmux allows a command to be bound to most keys, with or without a prefix
     key.  When specifying keys, most represent themselves (for example `A' to
     `Z').  Ctrl keys may be prefixed with `C-' or `^', and Alt (meta) with
     `M-'.  In addition, the following special key names are accepted: Up,
     Down, Left, Right, BSpace, BTab, DC (Delete), End, Enter, Escape, F1 to
     F12, Home, IC (Insert), NPage/PageDown/PgDn, PPage/PageUp/PgUp, Space,
     and Tab.  Note that to bind the `"' or `'' keys, quotation marks are
     necessary, for example:

           bind-key '"' split-window
           bind-key "'" new-window

     A command bound to the Any key will execute for all keys which do not
     have a more specific binding.

     Commands related to key bindings are as follows:

     bind-key [-nr] [-N note] [-T key-table] key command [arguments]
                   (alias: bind)
             Bind key key to command.  Keys are bound in a key table.  By
             default (without -T), the key is bound in the prefix key table.
             This table is used for keys pressed after the prefix key (for
             example, by default `c' is bound to new-window in the prefix
             table, so `C-b c' creates a new window).  The root table is used
             for keys pressed without the prefix key: binding `c' to
             new-window in the root table (not recommended) means a plain `c'
             will create a new window.  -n is an alias for -T root.  Keys may
             also be bound in custom key tables and the switch-client -T
             command used to switch to them from a key binding.  The -r flag
             indicates this key may repeat, see the repeat-time option.  -N
             attaches a note to the key (shown with list-keys -N).

             To view the default bindings and possible commands, see the
             list-keys command.

     list-keys [-1aN] [-P prefix-string -T key-table] [key]
                   (alias: lsk)
             List key bindings.  There are two forms: the default lists keys
             as bind-key commands; -N lists only keys with attached notes and
             shows only the key and note for each key.

             With the default form, all key tables are listed by default.  -T
             lists only keys in key-table.

             With the -N form, only keys in the root and prefix key tables are
             listed by default; -T also lists only keys in key-table.  -P
             specifies a prefix to print before each key and -1 lists only the
             first matching key.  -a lists the command for keys that do not
             have a note rather than skipping them.

     send-keys [-FHlMRX] [-N repeat-count] [-t target-pane] key ...
                   (alias: send)
             Send a key or keys to a window.  Each argument key is the name of
             the key (such as `C-a' or `NPage') to send; if the string is not
             recognised as a key, it is sent as a series of characters.  All
             arguments are sent sequentially from first to last.

             The -l flag disables key name lookup and processes the keys as
             literal UTF-8 characters.  The -H flag expects each key to be a
             hexadecimal number for an ASCII character.

             The -R flag causes the terminal state to be reset.

             -M passes through a mouse event (only valid if bound to a mouse
             key binding, see MOUSE SUPPORT).

             -X is used to send a command into copy mode - see the WINDOWS AND
             PANES section.  -N specifies a repeat count and -F expands
             formats in arguments where appropriate.

     send-prefix [-2] [-t target-pane]
             Send the prefix key, or with -2 the secondary prefix key, to a
             window as if it was pressed.

     unbind-key [-anq] [-T key-table] key
                   (alias: unbind)
             Unbind the command bound to key.  -n and -T are the same as for
             bind-key.  If -a is present, all key bindings are removed.  The
             -q option prevents errors being returned.

OPTIONS
     The appearance and behaviour of tmux may be modified by changing the
     value of various options.  There are four types of option: server
     options, session options, window options, and pane options.

     The tmux server has a set of global server options which do not apply to
     any particular window or session or pane.  These are altered with the
     set-option -s command, or displayed with the show-options -s command.

     In addition, each individual session may have a set of session options,
     and there is a separate set of global session options.  Sessions which do
     not have a particular option configured inherit the value from the global
     session options.  Session options are set or unset with the set-option
     command and may be listed with the show-options command.  The available
     server and session options are listed under the set-option command.

     Similarly, a set of window options is attached to each window and a set
     of pane options to each pane.  Pane options inherit from window options.
     This means any pane option may be set as a window option to apply the
     option to all panes in the window without the option set, for example
     these commands will set the background colour to red for all panes except
     pane 0:

           set -w window-style bg=red
           set -pt:.0 window-style bg=blue

     There is also a set of global window options from which any unset window
     or pane options are inherited.  Window and pane options are altered with
     set-option -w and -p commands and displayed with show-option -w and -p.

     tmux also supports user options which are prefixed with a `@'.  User
     options may have any name, so long as they are prefixed with `@', and be
     set to any string.  For example:

           $ tmux set -wq @foo "abc123"
           $ tmux show -wv @foo
           abc123

     Commands which set options are as follows:

     set-option [-aFgopqsuUw] [-t target-pane] option value
                   (alias: set)
             Set a pane option with -p, a window option with -w, a server
             option with -s, otherwise a session option.  If the option is not
             a user option, -w or -s may be unnecessary - tmux will infer the
             type from the option name, assuming -w for pane options.  If -g
             is given, the global session or window option is set.

             -F expands formats in the option value.  The -u flag unsets an
             option, so a session inherits the option from the global options
             (or with -g, restores a global option to the default).  -U unsets
             an option (like -u) but if the option is a pane option also
             unsets the option on any panes in the window.  value depends on
             the option and may be a number, a string, or a flag (on, off, or
             omitted to toggle).

             The -o flag prevents setting an option that is already set and
             the -q flag suppresses errors about unknown or ambiguous options.

             With -a, and if the option expects a string or a style, value is
             appended to the existing setting.  For example:

                   set -g status-left "foo"
                   set -ag status-left "bar"

             Will result in `foobar'.  And:

                   set -g status-style "bg=red"
                   set -ag status-style "fg=blue"

             Will result in a red background and blue foreground.  Without -a,
             the result would be the default background and a blue foreground.

     show-options [-AgHpqsvw] [-t target-pane] [option]
                   (alias: show)
             Show the pane options (or a single option if option is provided)
             with -p, the window options with -w, the server options with -s,
             otherwise the session options.  If the option is not a user
             option, -w or -s may be unnecessary - tmux will infer the type
             from the option name, assuming -w for pane options.  Global
             session or window options are listed if -g is used.  -v shows
             only the option value, not the name.  If -q is set, no error will
             be returned if option is unset.  -H includes hooks (omitted by
             default).  -A includes options inherited from a parent set of
             options, such options are marked with an asterisk.

     Available server options are:

     backspace key
             Set the key sent by tmux for backspace.

     buffer-limit number
             Set the number of buffers; as new buffers are added to the top of
             the stack, old ones are removed from the bottom if necessary to
             maintain this maximum length.

     command-alias[] name=value
             This is an array of custom aliases for commands.  If an unknown
             command matches name, it is replaced with value.  For example,
             after:

                   set -s command-alias[100] zoom='resize-pane -Z'

             Using:

                   zoom -t:.1

             Is equivalent to:

                   resize-pane -Z -t:.1

             Note that aliases are expanded when a command is parsed rather
             than when it is executed, so binding an alias with bind-key will
             bind the expanded form.

     default-terminal terminal
             Set the default terminal for new windows created in this session
             - the default value of the TERM environment variable.  For tmux
             to work correctly, this must be set to `screen', `tmux' or a
             derivative of them.

     copy-command shell-command
             Give the command to pipe to if the copy-pipe copy mode command is
             used without arguments.

     escape-time time
             Set the time in milliseconds for which tmux waits after an escape
             is input to determine if it is part of a function or meta key
             sequences.  The default is 500 milliseconds.

     editor shell-command
             Set the command used when tmux runs an editor.

     exit-empty [on | off]
             If enabled (the default), the server will exit when there are no
             active sessions.

     exit-unattached [on | off]
             If enabled, the server will exit when there are no attached
             clients.

     extended-keys [on | off]
             When enabled, extended keys are requested from the terminal and
             if supported are recognised by tmux.

     focus-events [on | off]
             When enabled, focus events are requested from the terminal if
             supported and passed through to applications running in tmux.
             Attached clients should be detached and attached again after
             changing this option.

     history-file path
             If not empty, a file to which tmux will write command prompt
             history on exit and load it from on start.

     message-limit number
             Set the number of error or information messages to save in the
             message log for each client.  The default is 100.

     set-clipboard [on | external | off]
             Attempt to set the terminal clipboard content using the xterm(1)
             escape sequence, if there is an Ms entry in the terminfo(5)
             description (see the TERMINFO EXTENSIONS section).

             If set to on, tmux will both accept the escape sequence to create
             a buffer and attempt to set the terminal clipboard.  If set to
             external, tmux will attempt to set the terminal clipboard but
             ignore attempts by applications to set tmux buffers.  If off,
             tmux will neither accept the clipboard escape sequence nor
             attempt to set the clipboard.

             Note that this feature needs to be enabled in xterm(1) by setting
             the resource:

                   disallowedWindowOps: 20,21,SetXprop

             Or changing this property from the xterm(1) interactive menu when
             required.

     terminal-features[] string
             Set terminal features for terminal types read from terminfo(5).
             tmux has a set of named terminal features.  Each will apply
             appropriate changes to the terminfo(5) entry in use.

             tmux can detect features for a few common terminals; this option
             can be used to easily tell tmux about features supported by
             terminals it cannot detect.  The terminal-overrides option allows
             individual terminfo(5) capabilities to be set instead,
             terminal-features is intended for classes of functionality
             supported in a standard way but not reported by terminfo(5).
             Care must be taken only to configure this with features the
             terminal actually support.

             This is an array option where each entry is a colon-separated
             string made up of a terminal type pattern (matched using
             fnmatch(3)) followed by a list of terminal features.  The
             available features are:

             256     Supports 256 colours with the SGR escape sequences.

             clipboard
                     Allows setting the system clipboard.

             ccolour
                     Allows setting the cursor colour.

             cstyle  Allows setting the cursor style.

             extkeys
                     Supports extended keys.

             focus   Supports focus reporting.

             margins
                     Supports DECSLRM margins.

             overline
                     Supports the overline SGR attribute.

             rectfill
                     Supports the DECFRA rectangle fill escape sequence.

             RGB     Supports RGB colour with the SGR escape sequences.

             strikethrough
                     Supports the strikethrough SGR escape sequence.

             sync    Supports synchronized updates.

             title   Supports xterm(1) title setting.

             usstyle
                     Allows underscore style and colour to be set.

     terminal-overrides[] string
             Allow terminal descriptions read using terminfo(5) to be
             overridden.  Each entry is a colon-separated string made up of a
             terminal type pattern (matched using fnmatch(3)) and a set of
             name=value entries.

             For example, to set the `clear' terminfo(5) entry to `\e[H\e[2J'
             for all terminal types matching `rxvt*':

                   rxvt*:clear=\e[H\e[2J

             The terminal entry value is passed through strunvis(3) before
             interpretation.

     user-keys[] key
             Set list of user-defined key escape sequences.  Each item is
             associated with a key named `User0', `User1', and so on.

             For example:

                   set -s user-keys[0] "\e[5;30012~"
                   bind User0 resize-pane -L 3

     Available session options are:

     activity-action [any | none | current | other]
             Set action on window activity when monitor-activity is on.  any
             means activity in any window linked to a session causes a bell or
             message (depending on visual-activity) in the current window of
             that session, none means all activity is ignored (equivalent to
             monitor-activity being off), current means only activity in
             windows other than the current window are ignored and other means
             activity in the current window is ignored but not those in other
             windows.

     assume-paste-time milliseconds
             If keys are entered faster than one in milliseconds, they are
             assumed to have been pasted rather than typed and tmux key
             bindings are not processed.  The default is one millisecond and
             zero disables.

     base-index index
             Set the base index from which an unused index should be searched
             when a new window is created.  The default is zero.

     bell-action [any | none | current | other]
             Set action on a bell in a window when monitor-bell is on.  The
             values are the same as those for activity-action.

     default-command shell-command
             Set the command used for new windows (if not specified when the
             window is created) to shell-command, which may be any sh(1)
             command.  The default is an empty string, which instructs tmux to
             create a login shell using the value of the default-shell option.

     default-shell path
             Specify the default shell.  This is used as the login shell for
             new windows when the default-command option is set to empty, and
             must be the full path of the executable.  When started tmux tries
             to set a default value from the first suitable of the SHELL
             environment variable, the shell returned by getpwuid(3), or
             /bin/sh.  This option should be configured when tmux is used as a
             login shell.

     default-size XxY
             Set the default size of new windows when the window-size option
             is set to manual or when a session is created with new-session
             -d.  The value is the width and height separated by an `x'
             character.  The default is 80x24.

     destroy-unattached [on | off]
             If enabled and the session is no longer attached to any clients,
             it is destroyed.

     detach-on-destroy [off | on | no-detached]
             If on (the default), the client is detached when the session it
             is attached to is destroyed.  If off, the client is switched to
             the most recently active of the remaining sessions.  If
             no-detached, the client is detached only if there are no detached
             sessions; if detached sessions exist, the client is switched to
             the most recently active.

     display-panes-active-colour colour
             Set the colour used by the display-panes command to show the
             indicator for the active pane.

     display-panes-colour colour
             Set the colour used by the display-panes command to show the
             indicators for inactive panes.

     display-panes-time time
             Set the time in milliseconds for which the indicators shown by
             the display-panes command appear.

     display-time time
             Set the amount of time for which status line messages and other
             on-screen indicators are displayed.  If set to 0, messages and
             indicators are displayed until a key is pressed.  time is in
             milliseconds.

     history-limit lines
             Set the maximum number of lines held in window history.  This
             setting applies only to new windows - existing window histories
             are not resized and retain the limit at the point they were
             created.

     key-table key-table
             Set the default key table to key-table instead of root.

     lock-after-time number
             Lock the session (like the lock-session command) after number
             seconds of inactivity.  The default is not to lock (set to 0).

     lock-command shell-command
             Command to run when locking each client.  The default is to run
             lock(1) with -np.

     message-command-style style
             Set status line message command style.  This is used for the
             command prompt with vi(1) keys when in command mode.  For how to
             specify style, see the STYLES section.

     message-style style
             Set status line message style.  This is used for messages and for
             the command prompt.  For how to specify style, see the STYLES
             section.

     mouse [on | off]
             If on, tmux captures the mouse and allows mouse events to be
             bound as key bindings.  See the MOUSE SUPPORT section for
             details.

     prefix key
             Set the key accepted as a prefix key.  In addition to the
             standard keys described under KEY BINDINGS, prefix can be set to
             the special key `None' to set no prefix.

     prefix2 key
             Set a secondary key accepted as a prefix key.  Like prefix,
             prefix2 can be set to `None'.

     renumber-windows [on | off]
             If on, when a window is closed in a session, automatically
             renumber the other windows in numerical order.  This respects the
             base-index option if it has been set.  If off, do not renumber
             the windows.

     repeat-time time
             Allow multiple commands to be entered without pressing the
             prefix-key again in the specified time milliseconds (the default
             is 500).  Whether a key repeats may be set when it is bound using
             the -r flag to bind-key.  Repeat is enabled for the default keys
             bound to the resize-pane command.

     set-titles [on | off]
             Attempt to set the client terminal title using the tsl and fsl
             terminfo(5) entries if they exist.  tmux automatically sets these
             to the \e]0;...\007 sequence if the terminal appears to be
             xterm(1).  This option is off by default.

     set-titles-string string
             String used to set the client terminal title if set-titles is on.
             Formats are expanded, see the FORMATS section.

     silence-action [any | none | current | other]
             Set action on window silence when monitor-silence is on.  The
             values are the same as those for activity-action.

     status [off | on | 2 | 3 | 4 | 5]
             Show or hide the status line or specify its size.  Using on gives
             a status line one row in height; 2, 3, 4 or 5 more rows.

     status-format[] format
             Specify the format to be used for each line of the status line.
             The default builds the top status line from the various
             individual status options below.

     status-interval interval
             Update the status line every interval seconds.  By default,
             updates will occur every 15 seconds.  A setting of zero disables
             redrawing at interval.

     status-justify [left | centre | right | absolute-centre]
             Set the position of the window list in the status line: left,
             centre or right.  centre puts the window list in the relative
             centre of the available free space; absolute-centre uses the
             centre of the entire horizontal space.

     status-keys [vi | emacs]
             Use vi or emacs-style key bindings in the status line, for
             example at the command prompt.  The default is emacs, unless the
             VISUAL or EDITOR environment variables are set and contain the
             string `vi'.

     status-left string
             Display string (by default the session name) to the left of the
             status line.  string will be passed through strftime(3).  Also
             see the FORMATS and STYLES sections.

             For details on how the names and titles can be set see the NAMES
             AND TITLES section.

             Examples are:

                   #(sysctl vm.loadavg)
                   #[fg=yellow,bold]#(apm -l)%%#[default] [#S]

             The default is `[#S] '.

     status-left-length length
             Set the maximum length of the left component of the status line.
             The default is 10.

     status-left-style style
             Set the style of the left part of the status line.  For how to
             specify style, see the STYLES section.

     status-position [top | bottom]
             Set the position of the status line.

     status-right string
             Display string to the right of the status line.  By default, the
             current pane title in double quotes, the date and the time are
             shown.  As with status-left, string will be passed to strftime(3)
             and character pairs are replaced.

     status-right-length length
             Set the maximum length of the right component of the status line.
             The default is 40.

     status-right-style style
             Set the style of the right part of the status line.  For how to
             specify style, see the STYLES section.

     status-style style
             Set status line style.  For how to specify style, see the STYLES
             section.

     update-environment[] variable
             Set list of environment variables to be copied into the session
             environment when a new session is created or an existing session
             is attached.  Any variables that do not exist in the source
             environment are set to be removed from the session environment
             (as if -r was given to the set-environment command).

     visual-activity [on | off | both]
             If on, display a message instead of sending a bell when activity
             occurs in a window for which the monitor-activity window option
             is enabled.  If set to both, a bell and a message are produced.

     visual-bell [on | off | both]
             If on, a message is shown on a bell in a window for which the
             monitor-bell window option is enabled instead of it being passed
             through to the terminal (which normally makes a sound).  If set
             to both, a bell and a message are produced.  Also see the
             bell-action option.

     visual-silence [on | off | both]
             If monitor-silence is enabled, prints a message after the
             interval has expired on a given window instead of sending a bell.
             If set to both, a bell and a message are produced.

     word-separators string
             Sets the session's conception of what characters are considered
             word separators, for the purposes of the next and previous word
             commands in copy mode.  The default is ` -_@'.

     Available window options are:

     aggressive-resize [on | off]
             Aggressively resize the chosen window.  This means that tmux will
             resize the window to the size of the smallest or largest session
             (see the window-size option) for which it is the current window,
             rather than the session to which it is attached.  The window may
             resize when the current window is changed on another session;
             this option is good for full-screen programs which support
             SIGWINCH and poor for interactive programs such as shells.

     automatic-rename [on | off]
             Control automatic window renaming.  When this setting is enabled,
             tmux will rename the window automatically using the format
             specified by automatic-rename-format.  This flag is automatically
             disabled for an individual window when a name is specified at
             creation with new-window or new-session, or later with
             rename-window, or with a terminal escape sequence.  It may be
             switched off globally with:

                   set-option -wg automatic-rename off

     automatic-rename-format format
             The format (see FORMATS) used when the automatic-rename option is
             enabled.

     clock-mode-colour colour
             Set clock colour.

     clock-mode-style [12 | 24]
             Set clock hour format.

     main-pane-height height
     main-pane-width width
             Set the width or height of the main (left or top) pane in the
             main-horizontal or main-vertical layouts.  If suffixed by `%',
             this is a percentage of the window size.

     copy-mode-match-style style
             Set the style of search matches in copy mode.  For how to specify
             style, see the STYLES section.

     copy-mode-mark-style style
             Set the style of the line containing the mark in copy mode.  For
             how to specify style, see the STYLES section.

     copy-mode-current-match-style style
             Set the style of the current search match in copy mode.  For how
             to specify style, see the STYLES section.

     mode-keys [vi | emacs]
             Use vi or emacs-style key bindings in copy mode.  The default is
             emacs, unless VISUAL or EDITOR contains `vi'.

     mode-style style
             Set window modes style.  For how to specify style, see the STYLES
             section.

     monitor-activity [on | off]
             Monitor for activity in the window.  Windows with activity are
             highlighted in the status line.

     monitor-bell [on | off]
             Monitor for a bell in the window.  Windows with a bell are
             highlighted in the status line.

     monitor-silence [interval]
             Monitor for silence (no activity) in the window within interval
             seconds.  Windows that have been silent for the interval are
             highlighted in the status line.  An interval of zero disables the
             monitoring.

     other-pane-height height
             Set the height of the other panes (not the main pane) in the
             main-horizontal layout.  If this option is set to 0 (the
             default), it will have no effect.  If both the main-pane-height
             and other-pane-height options are set, the main pane will grow
             taller to make the other panes the specified height, but will
             never shrink to do so.  If suffixed by `%', this is a percentage
             of the window size.

     other-pane-width width
             Like other-pane-height, but set the width of other panes in the
             main-vertical layout.

     pane-active-border-style style
             Set the pane border style for the currently active pane.  For how
             to specify style, see the STYLES section.  Attributes are
             ignored.

     pane-base-index index
             Like base-index, but set the starting index for pane numbers.

     pane-border-format format
             Set the text shown in pane border status lines.

     pane-border-lines type
             Set the type of characters used for drawing pane borders.  type
             may be one of:

             single  single lines using ACS or UTF-8 characters

             double  double lines using UTF-8 characters

             heavy   heavy lines using UTF-8 characters

             simple  simple ASCII characters

             number  the pane number

             `double' and `heavy' will fall back to standard ACS line drawing
             when UTF-8 is not supported.

     pane-border-status [off | top | bottom]
             Turn pane border status lines off or set their position.

     pane-border-style style
             Set the pane border style for panes aside from the active pane.
             For how to specify style, see the STYLES section.  Attributes are
             ignored.

     window-status-activity-style style
             Set status line style for windows with an activity alert.  For
             how to specify style, see the STYLES section.

     window-status-bell-style style
             Set status line style for windows with a bell alert.  For how to
             specify style, see the STYLES section.

     window-status-current-format string
             Like window-status-format, but is the format used when the window
             is the current window.

     window-status-current-style style
             Set status line style for the currently active window.  For how
             to specify style, see the STYLES section.

     window-status-format string
             Set the format in which the window is displayed in the status
             line window list.  See the FORMATS and STYLES sections.

     window-status-last-style style
             Set status line style for the last active window.  For how to
             specify style, see the STYLES section.

     window-status-separator string
             Sets the separator drawn between windows in the status line.  The
             default is a single space character.

     window-status-style style
             Set status line style for a single window.  For how to specify
             style, see the STYLES section.

     window-size largest | smallest | manual | latest
             Configure how tmux determines the window size.  If set to
             largest, the size of the largest attached session is used; if
             smallest, the size of the smallest.  If manual, the size of a new
             window is set from the default-size option and windows are
             resized automatically.  With latest, tmux uses the size of the
             client that had the most recent activity.  See also the
             resize-window command and the aggressive-resize option.

     wrap-search [on | off]
             If this option is set, searches will wrap around the end of the
             pane contents.  The default is on.

     Available pane options are:

     allow-rename [on | off]
             Allow programs in the pane to change the window name using a
             terminal escape sequence (\ek...\e\\).

     alternate-screen [on | off]
             This option configures whether programs running inside the pane
             may use the terminal alternate screen feature, which allows the
             smcup and rmcup terminfo(5) capabilities.  The alternate screen
             feature preserves the contents of the window when an interactive
             application starts and restores it on exit, so that any output
             visible before the application starts reappears unchanged after
             it exits.

     remain-on-exit [on | off | failed]
             A pane with this flag set is not destroyed when the program
             running in it exits.  If set to failed, then only when the
             program exit status is not zero.  The pane may be reactivated
             with the respawn-pane command.

     synchronize-panes [on | off]
             Duplicate input to all other panes in the same window where this
             option is also on (only for panes that are not in any mode).

     window-active-style style
             Set the pane style when it is the active pane.  For how to
             specify style, see the STYLES section.

     window-style style
             Set the pane style.  For how to specify style, see the STYLES
             section.

HOOKS
     tmux allows commands to run on various triggers, called hooks.  Most tmux
     commands have an after hook and there are a number of hooks not
     associated with commands.

     Hooks are stored as array options, members of the array are executed in
     order when the hook is triggered.  Like options different hooks may be
     global or belong to a session, window or pane.  Hooks may be configured
     with the set-hook or set-option commands and displayed with show-hooks or
     show-options -H.  The following two commands are equivalent:

            set-hook -g pane-mode-changed[42] 'set -g status-left-style bg=red'
            set-option -g pane-mode-changed[42] 'set -g status-left-style bg=red'

     Setting a hook without specifying an array index clears the hook and sets
     the first member of the array.

     A command's after hook is run after it completes, except when the command
     is run as part of a hook itself.  They are named with an `after-' prefix.
     For example, the following command adds a hook to select the even-
     vertical layout after every split-window:

           set-hook -g after-split-window "selectl even-vertical"

     All the notifications listed in the CONTROL MODE section are hooks
     (without any arguments), except %exit.  The following additional hooks
     are available:

     alert-activity          Run when a window has activity.  See
                             monitor-activity.

     alert-bell              Run when a window has received a bell.  See
                             monitor-bell.

     alert-silence           Run when a window has been silent.  See
                             monitor-silence.

     client-attached         Run when a client is attached.

     client-detached         Run when a client is detached

     client-resized          Run when a client is resized.

     client-session-changed  Run when a client's attached session is changed.

     pane-died               Run when the program running in a pane exits, but
                             remain-on-exit is on so the pane has not closed.

     pane-exited             Run when the program running in a pane exits.

     pane-focus-in           Run when the focus enters a pane, if the
                             focus-events option is on.

     pane-focus-out          Run when the focus exits a pane, if the
                             focus-events option is on.

     pane-set-clipboard      Run when the terminal clipboard is set using the
                             xterm(1) escape sequence.

     session-created         Run when a new session created.

     session-closed          Run when a session closed.

     session-renamed         Run when a session is renamed.

     window-linked           Run when a window is linked into a session.

     window-renamed          Run when a window is renamed.

     window-unlinked         Run when a window is unlinked from a session.

     Hooks are managed with these commands:

     set-hook [-agpRuw] [-t target-pane] hook-name command
             Without -R, sets (or with -u unsets) hook hook-name to command.
             The flags are the same as for set-option.

             With -R, run hook-name immediately.

     show-hooks [-gpw] [-t target-pane]
             Shows hooks.  The flags are the same as for show-options.

MOUSE SUPPORT
     If the mouse option is on (the default is off), tmux allows mouse events
     to be bound as keys.  The name of each key is made up of a mouse event
     (such as `MouseUp1') and a location suffix, one of the following:

           Pane             the contents of a pane
           Border           a pane border
           Status           the status line window list
           StatusLeft       the left part of the status line
           StatusRight      the right part of the status line
           StatusDefault    any other part of the status line

     The following mouse events are available:

           WheelUp       WheelDown
           MouseDown1    MouseUp1      MouseDrag1   MouseDragEnd1
           MouseDown2    MouseUp2      MouseDrag2   MouseDragEnd2
           MouseDown3    MouseUp3      MouseDrag3   MouseDragEnd3
           SecondClick1  SecondClick2  SecondClick3
           DoubleClick1  DoubleClick2  DoubleClick3
           TripleClick1  TripleClick2  TripleClick3

     The `SecondClick' events are fired for the second click of a double
     click, even if there may be a third click which will fire `TripleClick'
     instead of `DoubleClick'.

     Each should be suffixed with a location, for example `MouseDown1Status'.

     The special token `{mouse}' or `=' may be used as target-window or
     target-pane in commands bound to mouse key bindings.  It resolves to the
     window or pane over which the mouse event took place (for example, the
     window in the status line over which button 1 was released for a
     `MouseUp1Status' binding, or the pane over which the wheel was scrolled
     for a `WheelDownPane' binding).

     The send-keys -M flag may be used to forward a mouse event to a pane.

     The default key bindings allow the mouse to be used to select and resize
     panes, to copy text and to change window using the status line.  These
     take effect if the mouse option is turned on.

FORMATS
     Certain commands accept the -F flag with a format argument.  This is a
     string which controls the output format of the command.  Format variables
     are enclosed in `#{' and `}', for example `#{session_name}'.  The
     possible variables are listed in the table below, or the name of a tmux
     option may be used for an option's value.  Some variables have a shorter
     alias such as `#S'; `##' is replaced by a single `#', `#,' by a `,' and
     `#}' by a `}'.

     Conditionals are available by prefixing with `?' and separating two
     alternatives with a comma; if the specified variable exists and is not
     zero, the first alternative is chosen, otherwise the second is used.  For
     example `#{?session_attached,attached,not attached}' will include the
     string `attached' if the session is attached and the string `not
     attached' if it is unattached, or `#{?automatic-rename,yes,no}' will
     include `yes' if automatic-rename is enabled, or `no' if not.
     Conditionals can be nested arbitrarily.  Inside a conditional, `,' and
     `}' must be escaped as `#,' and `#}', unless they are part of a `#{...}'
     replacement.  For example:

           #{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .

     String comparisons may be expressed by prefixing two comma-separated
     alternatives by `==', `!=', `<', `>', `<=' or `>=' and a colon.  For
     example `#{==:#{host},myhost}' will be replaced by `1' if running on
     `myhost', otherwise by `0'.  `||' and `&&' evaluate to true if either or
     both of two comma-separated alternatives are true, for example
     `#{||:#{pane_in_mode},#{alternate_on}}'.

     An `m' specifies an fnmatch(3) or regular expression comparison.  The
     first argument is the pattern and the second the string to compare.  An
     optional argument specifies flags: `r' means the pattern is a regular
     expression instead of the default fnmatch(3) pattern, and `i' means to
     ignore case.  For example: `#{m:*foo*,#{host}}' or `#{m/ri:^A,MYVAR}'.  A
     `C' performs a search for an fnmatch(3) pattern or regular expression in
     the pane content and evaluates to zero if not found, or a line number if
     found.  Like `m', an `r' flag means search for a regular expression and
     `i' ignores case.  For example: `#{C/r:^Start}'

     Numeric operators may be performed by prefixing two comma-separated
     alternatives with an `e' and an operator.  An optional `f' flag may be
     given after the operator to use floating point numbers, otherwise
     integers are used.  This may be followed by a number giving the number of
     decimal places to use for the result.  The available operators are:
     addition `+', subtraction `-', multiplication `*', division `/', modulus
     `m' or `%' (note that `%' must be escaped as `%%' in formats which are
     also expanded by strftime(3)) and numeric comparison operators `==',
     `!=', `<', `<=', `>' and `>='.  For example, `#{e|*|f|4:5.5,3}'
     multiplies 5.5 by 3 for a result with four decimal places and
     `#{e|%%:7,3}' returns the modulus of 7 and 3.  `a' replaces a numeric
     argument by its ASCII equivalent, so `#{a:98}' results in `b'.

     A limit may be placed on the length of the resultant string by prefixing
     it by an `=', a number and a colon.  Positive numbers count from the
     start of the string and negative from the end, so `#{=5:pane_title}' will
     include at most the first five characters of the pane title, or
     `#{=-5:pane_title}' the last five characters.  A suffix or prefix may be
     given as a second argument - if provided then it is appended or prepended
     to the string if the length has been trimmed, for example
     `#{=/5/...:pane_title}' will append `...' if the pane title is more than
     five characters.  Similarly, `p' pads the string to a given width, for
     example `#{p10:pane_title}' will result in a width of at least 10
     characters.  A positive width pads on the left, a negative on the right.
     `n' expands to the length of the variable and `w' to its width when
     displayed, for example `#{n:window_name}'.

     Prefixing a time variable with `t:' will convert it to a string, so if
     `#{window_activity}' gives `1445765102', `#{t:window_activity}' gives
     `Sun Oct 25 09:25:02 2015'.  Adding `p (' ``t/p`') will use shorter but
     less accurate time format for times in the past.  A custom format may be
     given using an `f' suffix (note that `%' must be escaped as `%%' if the
     format is separately being passed through strftime(3), for example in the
     status-left option): `#{t/f/%%H#:%%M:window_activity}', see strftime(3).

     The `b:' and `d:' prefixes are basename(3) and dirname(3) of the variable
     respectively.  `q:' will escape sh(1) special characters or with a `h'
     suffix, escape hash characters (so `#' becomes `##').  `E:' will expand
     the format twice, for example `#{E:status-left}' is the result of
     expanding the content of the status-left option rather than the option
     itself.  `T:' is like `E:' but also expands strftime(3) specifiers.
     `S:', `W:' or `P:' will loop over each session, window or pane and insert
     the format once for each.  For windows and panes, two comma-separated
     formats may be given: the second is used for the current window or active
     pane.  For example, to get a list of windows formatted like the status
     line:

           #{W:#{E:window-status-format} ,#{E:window-status-current-format} }

     `N:' checks if a window (without any suffix or with the `w' suffix) or a
     session (with the `s' suffix) name exists, for example ``N/w:foo`' is
     replaced with 1 if a window named `foo' exists.

     A prefix of the form `s/foo/bar/:' will substitute `foo' with `bar'
     throughout.  The first argument may be an extended regular expression and
     a final argument may be `i' to ignore case, for example `s/a(.)/\1x/i:'
     would change `abABab' into `bxBxbx'.

     In addition, the last line of a shell command's output may be inserted
     using `#()'.  For example, `#(uptime)' will insert the system's uptime.
     When constructing formats, tmux does not wait for `#()' commands to
     finish; instead, the previous result from running the same command is
     used, or a placeholder if the command has not been run before.  If the
     command hasn't exited, the most recent line of output will be used, but
     the status line will not be updated more than once a second.  Commands
     are executed with the tmux global environment set (see the GLOBAL AND
     SESSION ENVIRONMENT section).

     An `l' specifies that a string should be interpreted literally and not
     expanded.  For example `#{l:#{?pane_in_mode,yes,no}}' will be replaced by
     `#{?pane_in_mode,yes,no}'.

     The following variables are available, where appropriate:

     Variable name          Alias    Replaced with
     active_window_index             Index of active window in session
     alternate_on                    1 if pane is in alternate screen
     alternate_saved_x               Saved cursor X in alternate screen
     alternate_saved_y               Saved cursor Y in alternate screen
     buffer_created                  Time buffer created
     buffer_name                     Name of buffer
     buffer_sample                   Sample of start of buffer
     buffer_size                     Size of the specified buffer in bytes
     client_activity                 Time client last had activity
     client_cell_height              Height of each client cell in pixels
     client_cell_width               Width of each client cell in pixels
     client_control_mode             1 if client is in control mode
     client_created                  Time client created
     client_discarded                Bytes discarded when client behind
     client_flags                    List of client flags
     client_height                   Height of client
     client_key_table                Current key table
     client_last_session             Name of the client's last session
     client_name                     Name of client
     client_pid                      PID of client process
     client_prefix                   1 if prefix key has been pressed
     client_readonly                 1 if client is readonly
     client_session                  Name of the client's session
     client_termfeatures             Terminal features of client, if any
     client_termname                 Terminal name of client
     client_termtype                 Terminal type of client, if available
     client_tty                      Pseudo terminal of client
     client_utf8                     1 if client supports UTF-8
     client_width                    Width of client
     client_written                  Bytes written to client
     command                         Name of command in use, if any
     command_list_alias              Command alias if listing commands
     command_list_name               Command name if listing commands
     command_list_usage              Command usage if listing commands
     config_files                    List of configuration files loaded
     copy_cursor_line                Line the cursor is on in copy mode
     copy_cursor_word                Word under cursor in copy mode
     copy_cursor_x                   Cursor X position in copy mode
     copy_cursor_y                   Cursor Y position in copy mode
     current_file                    Current configuration file
     cursor_character                Character at cursor in pane
     cursor_flag                     Pane cursor flag
     cursor_x                        Cursor X position in pane
     cursor_y                        Cursor Y position in pane
     history_bytes                   Number of bytes in window history
     history_limit                   Maximum window history lines
     history_size                    Size of history in lines
     hook                            Name of running hook, if any
     hook_pane                       ID of pane where hook was run, if any
     hook_session                    ID of session where hook was run, if any
     hook_session_name               Name of session where hook was run, if
                                     any
     hook_window                     ID of window where hook was run, if any
     hook_window_name                Name of window where hook was run, if any
     host                   #H       Hostname of local host
     host_short             #h       Hostname of local host (no domain name)
     insert_flag                     Pane insert flag
     keypad_cursor_flag              Pane keypad cursor flag
     keypad_flag                     Pane keypad flag
     last_window_index               Index of last window in session
     line                            Line number in the list
     mouse_all_flag                  Pane mouse all flag
     mouse_any_flag                  Pane mouse any flag
     mouse_button_flag               Pane mouse button flag
     mouse_line                      Line under mouse, if any
     mouse_sgr_flag                  Pane mouse SGR flag
     mouse_standard_flag             Pane mouse standard flag
     mouse_utf8_flag                 Pane mouse UTF-8 flag
     mouse_word                      Word under mouse, if any
     mouse_x                         Mouse X position, if any
     mouse_y                         Mouse Y position, if any
     origin_flag                     Pane origin flag
     pane_active                     1 if active pane
     pane_at_bottom                  1 if pane is at the bottom of window
     pane_at_left                    1 if pane is at the left of window
     pane_at_right                   1 if pane is at the right of window
     pane_at_top                     1 if pane is at the top of window
     pane_bg                         Pane background colour
     pane_bottom                     Bottom of pane
     pane_current_command            Current command if available
     pane_current_path               Current path if available
     pane_dead                       1 if pane is dead
     pane_dead_status                Exit status of process in dead pane
     pane_fg                         Pane foreground colour
     pane_format                     1 if format is for a pane
     pane_height                     Height of pane
     pane_id                #D       Unique pane ID
     pane_in_mode                    1 if pane is in a mode
     pane_index             #P       Index of pane
     pane_input_off                  1 if input to pane is disabled
     pane_last                       1 if last pane
     pane_left                       Left of pane
     pane_marked                     1 if this is the marked pane
     pane_marked_set                 1 if a marked pane is set
     pane_mode                       Name of pane mode, if any
     pane_path                       Path of pane (can be set by application)
     pane_pid                        PID of first process in pane
     pane_pipe                       1 if pane is being piped
     pane_right                      Right of pane
     pane_search_string              Last search string in copy mode
     pane_start_command              Command pane started with
     pane_synchronized               1 if pane is synchronized
     pane_tabs                       Pane tab positions
     pane_title             #T       Title of pane (can be set by application)
     pane_top                        Top of pane
     pane_tty                        Pseudo terminal of pane
     pane_width                      Width of pane
     pid                             Server PID
     rectangle_toggle                1 if rectangle selection is activated
     scroll_position                 Scroll position in copy mode
     scroll_region_lower             Bottom of scroll region in pane
     scroll_region_upper             Top of scroll region in pane
     search_match                    Search match if any
     search_present                  1 if search started in copy mode
     selection_active                1 if selection started and changes with
                                     the cursor in copy mode
     selection_end_x                 X position of the end of the selection
     selection_end_y                 Y position of the end of the selection
     selection_present               1 if selection started in copy mode
     selection_start_x               X position of the start of the selection
     selection_start_y               Y position of the start of the selection
     session_activity                Time of session last activity
     session_alerts                  List of window indexes with alerts
     session_attached                Number of clients session is attached to
     session_attached_list           List of clients session is attached to
     session_created                 Time session created
     session_format                  1 if format is for a session
     session_group                   Name of session group
     session_group_attached          Number of clients sessions in group are
                                     attached to
     session_group_attached_list
                                     List of clients sessions in group are
                                     attached to
     session_group_list              List of sessions in group
     session_group_many_attached
                                     1 if multiple clients attached to
                                     sessions in group
     session_group_size              Size of session group
     session_grouped                 1 if session in a group
     session_id                      Unique session ID
     session_last_attached           Time session last attached
     session_many_attached           1 if multiple clients attached
     session_marked                  1 if this session contains the marked
                                     pane
     session_name           #S       Name of session
     session_path                    Working directory of session
     session_stack                   Window indexes in most recent order
     session_windows                 Number of windows in session
     socket_path                     Server socket path
     start_time                      Server start time
     version                         Server version
     window_active                   1 if window active
     window_active_clients           Number of clients viewing this window
     window_active_clients_list
                                     List of clients viewing this window
     window_active_sessions          Number of sessions on which this window
                                     is active
     window_active_sessions_list
                                     List of sessions on which this window is
                                     active
     window_activity                 Time of window last activity
     window_activity_flag            1 if window has activity
     window_bell_flag                1 if window has bell
     window_bigger                   1 if window is larger than client
     window_cell_height              Height of each cell in pixels
     window_cell_width               Width of each cell in pixels
     window_end_flag                 1 if window has the highest index
     window_flags           #F       Window flags with # escaped as ##
     window_raw_flags                Window flags with nothing escaped
     window_format                   1 if format is for a window
     window_height                   Height of window
     window_id                       Unique window ID
     window_index           #I       Index of window
     window_last_flag                1 if window is the last used
     window_layout                   Window layout description, ignoring
                                     zoomed window panes
     window_linked                   1 if window is linked across sessions
     window_linked_sessions          Number of sessions this window is linked
                                     to
     window_linked_sessions_list
                                     List of sessions this window is linked to
     window_marked_flag              1 if window contains the marked pane
     window_name            #W       Name of window
     window_offset_x                 X offset into window if larger than
                                     client
     window_offset_y                 Y offset into window if larger than
                                     client
     window_panes                    Number of panes in window
     window_silence_flag             1 if window has silence alert
     window_stack_index              Index in session most recent stack
     window_start_flag               1 if window has the lowest index
     window_visible_layout           Window layout description, respecting
                                     zoomed window panes
     window_width                    Width of window
     window_zoomed_flag              1 if window is zoomed
     wrap_flag                       Pane wrap flag

STYLES
     tmux offers various options to specify the colour and attributes of
     aspects of the interface, for example status-style for the status line.
     In addition, embedded styles may be specified in format options, such as
     status-left, by enclosing them in `#[' and `]'.

     A style may be the single term `default' to specify the default style
     (which may come from an option, for example status-style in the status
     line) or a space or comma separated list of the following:

     fg=colour
             Set the foreground colour.  The colour is one of: black, red,
             green, yellow, blue, magenta, cyan, white; if supported the
             bright variants brightred, brightgreen, brightyellow; colour0 to
             colour255 from the 256-colour set; default for the default
             colour; terminal for the terminal default colour; or a
             hexadecimal RGB string such as `#ffffff'.

     bg=colour
             Set the background colour.

     none    Set no attributes (turn off any active attributes).

     acs, bright (or bold), dim, underscore, blink, reverse, hidden, italics,
             overline, strikethrough, double-underscore, curly-underscore,
             dotted-underscore, dashed-underscore
             Set an attribute.  Any of the attributes may be prefixed with
             `no' to unset.  acs is the terminal alternate character set.

     align=left (or noalign), align=centre, align=right
             Align text to the left, centre or right of the available space if
             appropriate.

     fill=colour
             Fill the available space with a background colour if appropriate.

     list=on, list=focus, list=left-marker, list=right-marker, nolist
             Mark the position of the various window list components in the
             status-format option: list=on marks the start of the list;
             list=focus is the part of the list that should be kept in focus
             if the entire list won't fit in the available space (typically
             the current window); list=left-marker and list=right-marker mark
             the text to be used to mark that text has been trimmed from the
             left or right of the list if there is not enough space.

     push-default, pop-default
             Store the current colours and attributes as the default or reset
             to the previous default.  A push-default affects any subsequent
             use of the default term until a pop-default.  Only one default
             may be pushed (each push-default replaces the previous saved
             default).

     range=left, range=right, range=window|X, norange
             Mark a range in the status-format option.  range=left and
             range=right are the text used for the `StatusLeft' and
             `StatusRight' mouse keys.  range=window|X is the range for a
             window passed to the `Status' mouse key, where `X' is a window
             index.

     Examples are:

           fg=yellow bold underscore blink
           bg=black,fg=default,noreverse

NAMES AND TITLES
     tmux distinguishes between names and titles.  Windows and sessions have
     names, which may be used to specify them in targets and are displayed in
     the status line and various lists: the name is the tmux identifier for a
     window or session.  Only panes have titles.  A pane's title is typically
     set by the program running inside the pane using an escape sequence (like
     it would set the xterm(1) window title in X(7)).  Windows themselves do
     not have titles - a window's title is the title of its active pane.  tmux
     itself may set the title of the terminal in which the client is running,
     see the set-titles option.

     A session's name is set with the new-session and rename-session commands.
     A window's name is set with one of:

     1.      A command argument (such as -n for new-window or new-session).

     2.      An escape sequence (if the allow-rename option is turned on):

                   $ printf '\033kWINDOW_NAME\033\\'

     3.      Automatic renaming, which sets the name to the active command in
             the window's active pane.  See the automatic-rename option.

     When a pane is first created, its title is the hostname.  A pane's title
     can be set via the title setting escape sequence, for example:

           $ printf '\033]2;My Title\033\\'

     It can also be modified with the select-pane -T command.

GLOBAL AND SESSION ENVIRONMENT
     When the server is started, tmux copies the environment into the global
     environment; in addition, each session has a session environment.  When a
     window is created, the session and global environments are merged.  If a
     variable exists in both, the value from the session environment is used.
     The result is the initial environment passed to the new process.

     The update-environment session option may be used to update the session
     environment from the client when a new session is created or an old
     reattached.  tmux also initialises the TMUX variable with some internal
     information to allow commands to be executed from inside, and the TERM
     variable with the correct terminal setting of `screen'.

     Variables in both session and global environments may be marked as
     hidden.  Hidden variables are not passed into the environment of new
     processes and instead can only be used by tmux itself (for example in
     formats, see the FORMATS section).

     Commands to alter and view the environment are:

     set-environment [-Fhgru] [-t target-session] name [value]
                   (alias: setenv)
             Set or unset an environment variable.  If -g is used, the change
             is made in the global environment; otherwise, it is applied to
             the session environment for target-session.  If -F is present,
             then value is expanded as a format.  The -u flag unsets a
             variable.  -r indicates the variable is to be removed from the
             environment before starting a new process.  -h marks the variable
             as hidden.

     show-environment [-hgs] [-t target-session] [variable]
                   (alias: showenv)
             Display the environment for target-session or the global
             environment with -g.  If variable is omitted, all variables are
             shown.  Variables removed from the environment are prefixed with
             `-'.  If -s is used, the output is formatted as a set of Bourne
             shell commands.  -h shows hidden variables (omitted by default).

STATUS LINE
     tmux includes an optional status line which is displayed in the bottom
     line of each terminal.

     By default, the status line is enabled and one line in height (it may be
     disabled or made multiple lines with the status session option) and
     contains, from left-to-right: the name of the current session in square
     brackets; the window list; the title of the active pane in double quotes;
     and the time and date.

     Each line of the status line is configured with the status-format option.
     The default is made of three parts: configurable left and right sections
     (which may contain dynamic content such as the time or output from a
     shell command, see the status-left, status-left-length, status-right, and
     status-right-length options below), and a central window list.  By
     default, the window list shows the index, name and (if any) flag of the
     windows present in the current session in ascending numerical order.  It
     may be customised with the window-status-format and
     window-status-current-format options.  The flag is one of the following
     symbols appended to the window name:

           Symbol    Meaning
           *         Denotes the current window.
           -         Marks the last window (previously selected).
           #         Window activity is monitored and activity has been
                     detected.
           !         Window bells are monitored and a bell has occurred in the
                     window.
           ~         The window has been silent for the monitor-silence
                     interval.
           M         The window contains the marked pane.
           Z         The window's active pane is zoomed.

     The # symbol relates to the monitor-activity window option.  The window
     name is printed in inverted colours if an alert (bell, activity or
     silence) is present.

     The colour and attributes of the status line may be configured, the
     entire status line using the status-style session option and individual
     windows using the window-status-style window option.

     The status line is automatically refreshed at interval if it has changed,
     the interval may be controlled with the status-interval session option.

     Commands related to the status line are as follows:

     command-prompt [-1ikNTW] [-I inputs] [-p prompts] [-t target-client]
             [template]
             Open the command prompt in a client.  This may be used from
             inside tmux to execute commands interactively.

             If template is specified, it is used as the command.  If present,
             -I is a comma-separated list of the initial text for each prompt.
             If -p is given, prompts is a comma-separated list of prompts
             which are displayed in order; otherwise a single prompt is
             displayed, constructed from template if it is present, or `:' if
             not.

             Before the command is executed, the first occurrence of the
             string `%%' and all occurrences of `%1' are replaced by the
             response to the first prompt, all `%2' are replaced with the
             response to the second prompt, and so on for further prompts.  Up
             to nine prompt responses may be replaced (`%1' to `%9').  `%%%'
             is like `%%' but any quotation marks are escaped.

             -1 makes the prompt only accept one key press, in this case the
             resulting input is a single character.  -k is like -1 but the key
             press is translated to a key name.  -N makes the prompt only
             accept numeric key presses.  -i executes the command every time
             the prompt input changes instead of when the user exits the
             command prompt.  -T tells tmux that the prompt is for a target
             which affects what completions are offered when Tab is pressed;
             -W is similar but indicates the prompt is for a window.

             The following keys have a special meaning in the command prompt,
             depending on the value of the status-keys option:

                   Function                             vi        emacs
                   Cancel command prompt                q         Escape
                   Delete from cursor to start of word            C-w
                   Delete entire command                d         C-u
                   Delete from cursor to end            D         C-k
                   Execute command                      Enter     Enter
                   Get next command from history                  Down
                   Get previous command from history              Up
                   Insert top paste buffer              p         C-y
                   Look for completions                 Tab       Tab
                   Move cursor left                     h         Left
                   Move cursor right                    l         Right
                   Move cursor to end                   $         C-e
                   Move cursor to next word             w         M-f
                   Move cursor to previous word         b         M-b
                   Move cursor to start                 0         C-a
                   Transpose characters                           C-t

     confirm-before [-p prompt] [-t target-client] command
                   (alias: confirm)
             Ask for confirmation before executing command.  If -p is given,
             prompt is the prompt to display; otherwise a prompt is
             constructed from command.  It may contain the special character
             sequences supported by the status-left option.

             This command works only from inside tmux.

     display-menu [-O] [-c target-client] [-t target-pane] [-T title] [-x
             position] [-y position] name key command ...
                   (alias: menu)
             Display a menu on target-client.  target-pane gives the target
             for any commands run from the menu.

             A menu is passed as a series of arguments: first the menu item
             name, second the key shortcut (or empty for none) and third the
             command to run when the menu item is chosen.  The name and
             command are formats, see the FORMATS and STYLES sections.  If the
             name begins with a hyphen (-), then the item is disabled (shown
             dim) and may not be chosen.  The name may be empty for a
             separator line, in which case both the key and command should be
             omitted.

             -T is a format for the menu title (see FORMATS).

             -x and -y give the position of the menu.  Both may be a row or
             column number, or one of the following special values:

                   Value    Flag    Meaning
                   C        Both    The centre of the terminal
                   R        -x      The right side of the terminal
                   P        Both    The bottom left of the pane
                   M        Both    The mouse position
                   W        Both    The window position on the status line
                   S        -y      The line above or below the status line

             Or a format, which is expanded including the following additional
             variables:

                   Variable name                 Replaced with
                   popup_centre_x                Centered in the client
                   popup_centre_y                Centered in the client
                   popup_height                  Height of menu or popup
                   popup_mouse_bottom            Bottom of at the mouse
                   popup_mouse_centre_x          Horizontal centre at the
                                                 mouse
                   popup_mouse_centre_y          Vertical centre at the mouse
                   popup_mouse_top               Top at the mouse
                   popup_mouse_x                 Mouse X position
                   popup_mouse_y                 Mouse Y position
                   popup_pane_bottom             Bottom of the pane
                   popup_pane_left               Left of the pane
                   popup_pane_right              Right of the pane
                   popup_pane_top                Top of the pane
                   popup_status_line_y           Above or below the status
                                                 line
                   popup_width                   Width of menu or popup
                   popup_window_status_line_x    At the window position in
                                                 status line
                   popup_window_status_line_y    At the status line showing
                                                 the window

             Each menu consists of items followed by a key shortcut shown in
             brackets.  If the menu is too large to fit on the terminal, it is
             not displayed.  Pressing the key shortcut chooses the
             corresponding item.  If the mouse is enabled and the menu is
             opened from a mouse key binding, releasing the mouse button with
             an item selected chooses that item and releasing the mouse button
             without an item selected closes the menu.  -O changes this
             behaviour so that the menu does not close when the mouse button
             is released without an item selected the menu is not closed and a
             mouse button must be clicked to choose an item.

             The following keys are also available:

                   Key    Function
                   Enter  Choose selected item
                   Up     Select previous item
                   Down   Select next item
                   q      Exit menu

     display-message [-aINpv] [-c target-client] [-d delay] [-t target-pane]
             [message]
                   (alias: display)
             Display a message.  If -p is given, the output is printed to
             stdout, otherwise it is displayed in the target-client status
             line for up to delay milliseconds.  If delay is not given, the
             message-time option is used; a delay of zero waits for a key
             press.  `N' ignores key presses and closes only after the delay
             expires.  The format of message is described in the FORMATS
             section; information is taken from target-pane if -t is given,
             otherwise the active pane.

             -v prints verbose logging as the format is parsed and -a lists
             the format variables and their values.

             -I forwards any input read from stdin to the empty pane given by
             target-pane.

     display-popup [-CE] [-c target-client] [-d start-directory] [-h height]
             [-t target-pane] [-w width] [-x position] [-y position]
             [shell-command]
                   (alias: popup)
             Display a popup running shell-command on target-client.  A popup
             is a rectangular box drawn over the top of any panes.  Panes are
             not updated while a popup is present.

             -E closes the popup automatically when shell-command exits.  Two
             -E closes the popup only if shell-command exited with success.

             -x and -y give the position of the popup, they have the same
             meaning as for the display-menu command.  -w and -h give the
             width and height - both may be a percentage (followed by `%').
             If omitted, half of the terminal size is used.

             The -C flag closes any popup on the client.

BUFFERS
     tmux maintains a set of named paste buffers.  Each buffer may be either
     explicitly or automatically named.  Explicitly named buffers are named
     when created with the set-buffer or load-buffer commands, or by renaming
     an automatically named buffer with set-buffer -n.  Automatically named
     buffers are given a name such as `buffer0001', `buffer0002' and so on.
     When the buffer-limit option is reached, the oldest automatically named
     buffer is deleted.  Explicitly named buffers are not subject to
     buffer-limit and may be deleted with the delete-buffer command.

     Buffers may be added using copy-mode or the set-buffer and load-buffer
     commands, and pasted into a window using the paste-buffer command.  If a
     buffer command is used and no buffer is specified, the most recently
     added automatically named buffer is assumed.

     A configurable history buffer is also maintained for each window.  By
     default, up to 2000 lines are kept; this can be altered with the
     history-limit option (see the set-option command above).

     The buffer commands are as follows:

     choose-buffer [-NZr] [-F format] [-f filter] [-K key-format] [-O
             sort-order] [-t target-pane] [template]
             Put a pane into buffer mode, where a buffer may be chosen
             interactively from a list.  Each buffer is shown on one line.  A
             shortcut key is shown on the left in brackets allowing for
             immediate choice, or the list may be navigated and an item chosen
             or otherwise manipulated using the keys below.  -Z zooms the
             pane.  The following keys may be used in buffer mode:

                   Key    Function
                   Enter  Paste selected buffer
                   Up     Select previous buffer
                   Down   Select next buffer
                   C-s    Search by name or content
                   n      Repeat last search
                   t      Toggle if buffer is tagged
                   T      Tag no buffers
                   C-t    Tag all buffers
                   p      Paste selected buffer
                   P      Paste tagged buffers
                   d      Delete selected buffer
                   D      Delete tagged buffers
                   e      Open the buffer in an editor
                   f      Enter a format to filter items
                   O      Change sort field
                   r      Reverse sort order
                   v      Toggle preview
                   q      Exit mode

             After a buffer is chosen, `%%' is replaced by the buffer name in
             template and the result executed as a command.  If template is
             not given, "paste-buffer -b '%%'" is used.

             -O specifies the initial sort field: one of `time', `name' or
             `size'.  -r reverses the sort order.  -f specifies an initial
             filter: the filter is a format - if it evaluates to zero, the
             item in the list is not shown, otherwise it is shown.  If a
             filter would lead to an empty list, it is ignored.  -F specifies
             the format for each item in the list and -K a format for each
             shortcut key; both are evaluated once for each line.  -N starts
             without the preview.  This command works only if at least one
             client is attached.

     clear-history [-t target-pane]
                   (alias: clearhist)
             Remove and free the history for the specified pane.

     delete-buffer [-b buffer-name]
                   (alias: deleteb)
             Delete the buffer named buffer-name, or the most recently added
             automatically named buffer if not specified.

     list-buffers [-F format] [-f filter]
                   (alias: lsb)
             List the global buffers.  -F specifies the format of each line
             and -f a filter.  Only buffers for which the filter is true are
             shown.  See the FORMATS section.

     load-buffer [-w] [-b buffer-name] [-t target-client] path
                   (alias: loadb)
             Load the contents of the specified paste buffer from path.  If -w
             is given, the buffer is also sent to the clipboard for
             target-client using the xterm(1) escape sequence, if possible.

     paste-buffer [-dpr] [-b buffer-name] [-s separator] [-t target-pane]
                   (alias: pasteb)
             Insert the contents of a paste buffer into the specified pane.
             If not specified, paste into the current one.  With -d, also
             delete the paste buffer.  When output, any linefeed (LF)
             characters in the paste buffer are replaced with a separator, by
             default carriage return (CR).  A custom separator may be
             specified using the -s flag.  The -r flag means to do no
             replacement (equivalent to a separator of LF).  If -p is
             specified, paste bracket control codes are inserted around the
             buffer if the application has requested bracketed paste mode.

     save-buffer [-a] [-b buffer-name] path
                   (alias: saveb)
             Save the contents of the specified paste buffer to path.  The -a
             option appends to rather than overwriting the file.

     set-buffer [-aw] [-b buffer-name] [-t target-client] [-n new-buffer-name]
             data
                   (alias: setb)
             Set the contents of the specified buffer to data.  If -w is
             given, the buffer is also sent to the clipboard for target-client
             using the xterm(1) escape sequence, if possible.  The -a option
             appends to rather than overwriting the buffer.  The -n option
             renames the buffer to new-buffer-name.

     show-buffer [-b buffer-name]
                   (alias: showb)
             Display the contents of the specified buffer.

MISCELLANEOUS
     Miscellaneous commands are as follows:

     clock-mode [-t target-pane]
             Display a large clock.

     if-shell [-bF] [-t target-pane] shell-command command [command]
                   (alias: if)
             Execute the first command if shell-command returns success or the
             second command otherwise.  Before being executed, shell-command
             is expanded using the rules specified in the FORMATS section,
             including those relevant to target-pane.  With -b, shell-command
             is run in the background.

             If -F is given, shell-command is not executed but considered
             success if neither empty nor zero (after formats are expanded).

     lock-server
                   (alias: lock)
             Lock each client individually by running the command specified by
             the lock-command option.

     run-shell [-bC] [-d delay] [-t target-pane] [shell-command]
                   (alias: run)
             Execute shell-command or (with -C) a tmux command in the
             background without creating a window.  Before being executed,
             shell-command is expanded using the rules specified in the
             FORMATS section.  With -b, the command is run in the background.
             -d waits for delay seconds before starting the command.  If -C is
             not given, any output to stdout is displayed in view mode (in the
             pane specified by -t or the current pane if omitted) after the
             command finishes.  If the command fails, the exit status is also
             displayed.

     wait-for [-L | -S | -U] channel
                   (alias: wait)
             When used without options, prevents the client from exiting until
             woken using wait-for -S with the same channel.  When -L is used,
             the channel is locked and any clients that try to lock the same
             channel are made to wait until the channel is unlocked with
             wait-for -U.

EXIT MESSAGES
     When a tmux client detaches, it prints a message.  This may be one of:

     detached (from session ...)
             The client was detached normally.

     detached and SIGHUP
             The client was detached and its parent sent the SIGHUP signal
             (for example with detach-client -P).

     lost tty
             The client's tty(4) or pty(4) was unexpectedly destroyed.

     terminated
             The client was killed with SIGTERM.

     too far behind
             The client is in control mode and became unable to keep up with
             the data from tmux.

     exited  The server exited when it had no sessions.

     server exited
             The server exited when it received SIGTERM.

     server exited unexpectedly
             The server crashed or otherwise exited without telling the client
             the reason.

TERMINFO EXTENSIONS
     tmux understands some unofficial extensions to terminfo(5).  It is not
     normally necessary to set these manually, instead the terminal-features
     option should be used.

     AX      An existing extension that tells tmux the terminal supports
             default colours.

     Bidi    Tell tmux that the terminal supports the VTE bidirectional text
             extensions.

     Cs, Cr  Set the cursor colour.  The first takes a single string argument
             and is used to set the colour; the second takes no arguments and
             restores the default cursor colour.  If set, a sequence such as
             this may be used to change the cursor colour from inside tmux:

                   $ printf '\033]12;red\033\\'

     Cmg, Clmg, Dsmg, Enmg
             Set, clear, disable or enable DECSLRM margins.  These are set
             automatically if the terminal reports it is VT420 compatible.

     Dsbp, Enbp
             Disable and enable bracketed paste.  These are set automatically
             if the XT capability is present.

     Dseks, Eneks
             Disable and enable extended keys.

     Dsfcs, Enfcs
             Disable and enable focus reporting.  These are set automatically
             if the XT capability is present.

     Smol    Enable the overline attribute.

     Smulx   Set a styled underscore.  The single parameter is one of: 0 for
             no underscore, 1 for normal underscore, 2 for double underscore,
             3 for curly underscore, 4 for dotted underscore and 5 for dashed
             underscore.

     Setulc, ol
             Set the underscore colour or reset to the default.  The argument
             is (red * 65536) + (green * 256) + blue where each is between 0
             and 255.

     Ss, Se  Set or reset the cursor style.  If set, a sequence such as this
             may be used to change the cursor to an underline:

                   $ printf '\033[4 q'

             If Se is not set, Ss with argument 0 will be used to reset the
             cursor style instead.

     Sync    Start (parameter is 1) or end (parameter is 2) a synchronized
             update.

     Tc      Indicate that the terminal supports the `direct colour' RGB
             escape sequence (for example, \e[38;2;255;255;255m).

             If supported, this is used for the initialize colour escape
             sequence (which may be enabled by adding the `initc' and `ccc'
             capabilities to the tmux terminfo(5) entry).

             This is equivalent to the RGB terminfo(5) capability.

     Ms      Store the current buffer in the host terminal's selection
             (clipboard).  See the set-clipboard option above and the xterm(1)
             man page.

     XT      This is an existing extension capability that tmux uses to mean
             that the terminal supports the xterm(1) title set sequences and
             to automatically set some of the capabilities above.

CONTROL MODE
     tmux offers a textual interface called control mode.  This allows
     applications to communicate with tmux using a simple text-only protocol.

     In control mode, a client sends tmux commands or command sequences
     terminated by newlines on standard input.  Each command will produce one
     block of output on standard output.  An output block consists of a %begin
     line followed by the output (which may be empty).  The output block ends
     with a %end or %error.  %begin and matching %end or %error have two
     arguments: an integer time (as seconds from epoch) and command number.
     For example:

           %begin 1363006971 2
           0: ksh* (1 panes) [80x24] [layout b25f,80x24,0,0,2] @2 (active)
           %end 1363006971 2

     The refresh-client -C command may be used to set the size of a client in
     control mode.

     In control mode, tmux outputs notifications.  A notification will never
     occur inside an output block.

     The following notifications are defined:

     %client-detached client
             The client has detached.

     %client-session-changed client session-id name
             The client is now attached to the session with ID session-id,
             which is named name.

     %continue pane-id
             The pane has been continued after being paused (if the
             pause-after flag is set, see refresh-client -A).

     %exit [reason]
             The tmux client is exiting immediately, either because it is not
             attached to any session or an error occurred.  If present, reason
             describes why the client exited.

     %extended-output pane-id age ... : value
             New form of %output sent when the pause-after flag is set.  age
             is the time in milliseconds for which tmux had buffered the
             output before it was sent.  Any subsequent arguments up until a
             single `:' are for future use and should be ignored.

     %layout-change window-id window-layout window-visible-layout window-flags
             The layout of a window with ID window-id changed.  The new layout
             is window-layout.  The window's visible layout is
             window-visible-layout and the window flags are window-flags.

     %output pane-id value
             A window pane produced output.  value escapes non-printable
             characters and backslash as octal \xxx.

     %pane-mode-changed pane-id
             The pane with ID pane-id has changed mode.

     %pause pane-id
             The pane has been paused (if the pause-after flag is set).

     %session-changed session-id name
             The client is now attached to the session with ID session-id,
             which is named name.

     %session-renamed name
             The current session was renamed to name.

     %session-window-changed session-id window-id
             The session with ID session-id changed its active window to the
             window with ID window-id.

     %sessions-changed
             A session was created or destroyed.

     %subscription-changed name session-id window-id window-index pane-id ...
             : value
             The value of the format associated with subscription name has
             changed to value.  See refresh-client -B.  Any arguments after
             pane-id up until a single `:' are for future use and should be
             ignored.

     %unlinked-window-add window-id
             The window with ID window-id was created but is not linked to the
             current session.

     %window-add window-id
             The window with ID window-id was linked to the current session.

     %window-close window-id
             The window with ID window-id closed.

     %window-pane-changed window-id pane-id
             The active pane in the window with ID window-id changed to the
             pane with ID pane-id.

     %window-renamed window-id name
             The window with ID window-id was renamed to name.

ENVIRONMENT
     When tmux is started, it inspects the following environment variables:

     EDITOR    If the command specified in this variable contains the string
               `vi' and VISUAL is unset, use vi-style key bindings.
               Overridden by the mode-keys and status-keys options.

     HOME      The user's login directory.  If unset, the passwd(5) database
               is consulted.

     LC_CTYPE  The character encoding locale(1).  It is used for two separate
               purposes.  For output to the terminal, UTF-8 is used if the -u
               option is given or if LC_CTYPE contains "UTF-8" or "UTF8".
               Otherwise, only ASCII characters are written and non-ASCII
               characters are replaced with underscores (`_').  For input,
               tmux always runs with a UTF-8 locale.  If en_US.UTF-8 is
               provided by the operating system it is used and LC_CTYPE is
               ignored for input.  Otherwise, LC_CTYPE tells tmux what the
               UTF-8 locale is called on the current system.  If the locale
               specified by LC_CTYPE is not available or is not a UTF-8
               locale, tmux exits with an error message.

     LC_TIME   The date and time format locale(1).  It is used for locale-
               dependent strftime(3) format specifiers.

     PWD       The current working directory to be set in the global
               environment.  This may be useful if it contains symbolic links.
               If the value of the variable does not match the current working
               directory, the variable is ignored and the result of getcwd(3)
               is used instead.

     SHELL     The absolute path to the default shell for new windows.  See
               the default-shell option for details.

     TMUX_TMPDIR
               The parent directory of the directory containing the server
               sockets.  See the -L option for details.

     VISUAL    If the command specified in this variable contains the string
               `vi', use vi-style key bindings.  Overridden by the mode-keys
               and status-keys options.

FILES
     ~/.tmux.conf               Default tmux configuration file.
     @SYSCONFDIR@/tmux.conf     System-wide configuration file.

EXAMPLES
     To create a new tmux session running vi(1):

           $ tmux new-session vi

     Most commands have a shorter form, known as an alias.  For new-session,
     this is new:

           $ tmux new vi

     Alternatively, the shortest unambiguous form of a command is accepted.
     If there are several options, they are listed:

           $ tmux n
           ambiguous command: n, could be: new-session, new-window, next-window

     Within an active session, a new window may be created by typing `C-b c'
     (Ctrl followed by the `b' key followed by the `c' key).

     Windows may be navigated with: `C-b 0' (to select window 0), `C-b 1' (to
     select window 1), and so on; `C-b n' to select the next window; and `C-b
     p' to select the previous window.

     A session may be detached using `C-b d' (or by an external event such as
     ssh(1) disconnection) and reattached with:

           $ tmux attach-session

     Typing `C-b ?' lists the current key bindings in the current window; up
     and down may be used to navigate the list or `q' to exit from it.

     Commands to be run when the tmux server is started may be placed in the
     ~/.tmux.conf configuration file.  Common examples include:

     Changing the default prefix key:

           set-option -g prefix C-a
           unbind-key C-b
           bind-key C-a send-prefix

     Turning the status line off, or changing its colour:

           set-option -g status off
           set-option -g status-style bg=blue

     Setting other options, such as the default command, or locking after 30
     minutes of inactivity:

           set-option -g default-command "exec /bin/ksh"
           set-option -g lock-after-time 1800

     Creating new key bindings:

           bind-key b set-option status
           bind-key / command-prompt "split-window 'exec man %%'"
           bind-key S command-prompt "new-window -n %1 'ssh %1'"

SEE ALSO
     pty(4)

AUTHORS
     Nicholas Marriott <nicholas.marriott@gmail.com>

NetBSD 9.99                     January 6, 2020                    NetBSD 9.99