Add a per-pane option set. Pane options inherit from window options (so

there should be no change to existing behaviour) and are set and shown
with set-option -p and show-options -p.

Change remain-on-exit and window-style/window-active-style to be pane
options (some others will be changed later).

This makes select-pane -P and -g unnecessary so no longer document them
(they still work) and no longer document set-window-option and
show-window-options in favour of set-option -w and show-options -w.

tmux.1

@@ -876,7 +876,7 @@ refresh-client -t/dev/ttyp2
 
 rename-session -tfirst newname
 
-set-window-option -t:0 monitor-activity on
+set-option -wt:0 monitor-activity on
 
 new-window ; split-window -d
 
@@ -2323,8 +2323,7 @@ applies the last set layout if possible (undoes the most recent layout change).
 .Fl E
 spreads the current pane and any panes next to it out evenly.
 .It Xo Ic select-pane
-.Op Fl DdegLlMmRU
-.Op Fl P Ar style
+.Op Fl DdeLlMmRU
 .Op Fl T Ar title
 .Op Fl t Ar target-pane
 .Xc
@@ -2351,6 +2350,8 @@ command.
 enables or
 .Fl d
 disables input to the pane.
+.Fl T
+sets the pane title.
 .Pp
 .Fl m
 and
@@ -2365,25 +2366,6 @@ to
 .Ic swap-pane
 and
 .Ic swap-window .
-.Pp
-Each pane has a style: by default the
-.Ic window-style
-and
-.Ic window-active-style
-options are used,
-.Ic select-pane
-.Fl P
-sets the style for a single pane.
-For example, to set the pane 1 background to red:
-.Bd -literal -offset indent
-select-pane -t:.1 -P 'bg=red'
-.Ed
-.Pp
-.Fl g
-shows the current pane style.
-.Pp
-.Fl T
-sets the pane title.
 .It Xo Ic select-window
 .Op Fl lnpT
 .Op Fl t Ar target-window
@@ -2702,16 +2684,17 @@ is present, all key bindings are removed.
 The appearance and behaviour of
 .Nm
 may be modified by changing the value of various options.
-There are three types of option:
+There are four types of option:
 .Em server options ,
 .Em session options
+.Em window options
 and
-.Em window options .
+.Em pane options .
 .Pp
 The
 .Nm
 server has a set of global options which do not apply to any particular
-window or session.
+window or session or pane.
 These are altered with the
 .Ic set-option
 .Fl s
@@ -2733,16 +2716,29 @@ The available server and session options are listed under the
 .Ic set-option
 command.
 .Pp
-Similarly, a set of window options is attached to each window, and there is
-a set of global window options from which any unset options are inherited.
-Window options are altered with the
-.Ic set-window-option
-command and can be listed with the
-.Ic show-window-options
-command.
-All window options are documented with the
-.Ic set-window-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:
+.Bd -literal -offset indent
+set -w window-style bg=red
+set -pt:.0 window-style bg=blue
+.Ed
+.Pp
+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
+.Ic set-option
+.Fl w
+and
+.Fl p
+commands and displayed with
+.Ic show-option
+.Fl w
+and
+.Fl p .
 .Pp
 .Nm
 also supports user options which are prefixed with a
@@ -2760,26 +2756,27 @@ abc123
 Commands which set options are as follows:
 .Bl -tag -width Ds
 .It Xo Ic set-option
-.Op Fl aFgoqsuw
-.Op Fl t Ar target-session | Ar target-window
+.Op Fl aFgopqsuw
+.Op Fl t Ar target-pane
 .Ar option Ar value
 .Xc
 .D1 (alias: Ic set )
-Set a window option with
-.Fl w
-(equivalent to the
-.Ic set-window-option
-command),
+Set a pane option with
+.Fl p ,
+a window option with
+.Fl w ,
 a server option with
 .Fl s ,
 otherwise a session option.
 If the option is not a user option,
 .Fl w
-and
+or
 .Fl s
-are unnecessary -
+may be unnecessary -
 .Nm
-will infer the type from the option name.
+will infer the type from the option name, assuming
+.Fl w
+for pane options.
 If
 .Fl g
 is given, the global session or window option is set.
@@ -2824,13 +2821,49 @@ blue foreground.
 Without
 .Fl a ,
 the result would be the default background and a blue foreground.
-.Pp
-Available window options are listed under
-.Ic set-window-option .
-.Pp
+.It Xo Ic show-options
+.Op Fl AgHpqsvw
+.Op Fl t Ar target-pane
+.Op Ar option
+.Xc
+.D1 (alias: Ic show )
+Show the pane options (or a single option if
+.Ar option
+is provided) with
+.Fl p ,
+the window options with
+.Fl w ,
+the server options with
+.Fl s ,
+otherwise the session options.
+If the option is not a user option,
+.Fl w
+or
+.Fl s
+may be unnecessary -
+.Nm
+will infer the type from the option name, assuming
+.Fl w
+for pane options.
+Global session or window options are listed if
+.Fl g
+is used.
+.Fl v
+shows only the option value, not the name.
+If
+.Fl q
+is set, no error will be returned if
+.Ar option
+is unset.
+.Fl H
+includes hooks (omitted by default).
+.Fl A
+includes options inherited from a parent set of options, such options are
+marked with an asterisk.
 .Ar value
 depends on the option and may be a number, a string, or a flag (on, off, or
 omitted to toggle).
+.El
 .Pp
 Available server options are:
 .Bl -tag -width Ds
@@ -3357,26 +3390,8 @@ copy mode.
 The default is
 .Ql \ -_@ .
 .El
-.It Xo Ic set-window-option
-.Op Fl aFgoqu
-.Op Fl t Ar target-window
-.Ar option Ar value
-.Xc
-.D1 (alias: Ic setw )
-Set a window option.
-The
-.Fl a ,
-.Fl F ,
-.Fl g ,
-.Fl o ,
-.Fl q
-and
-.Fl u
-flags work similarly to the
-.Ic set-option
-command.
 .Pp
-Supported window options are:
+Available window options are:
 .Pp
 .Bl -tag -width Ds -compact
 .It Xo Ic aggressive-resize
@@ -3436,7 +3451,7 @@ or later with
 or with a terminal escape sequence.
 It may be switched off globally with:
 .Bd -literal -offset indent
-set-window-option -g automatic-rename off
+set-option -wg automatic-rename off
 .Ed
 .Pp
 .It Ic automatic-rename-format Ar format
@@ -3553,29 +3568,12 @@ see the
 section.
 Attributes are ignored.
 .Pp
-.It Xo Ic remain-on-exit
-.Op Ic on | off
-.Xc
-A window with this flag set is not destroyed when the program running in it
-exits.
-The window may be reactivated with the
-.Ic respawn-window
-command.
-.Pp
 .It Xo Ic synchronize-panes
 .Op Ic on | off
 .Xc
 Duplicate input to any pane to all other panes in the same window (only
 for panes that are not in any special mode).
 .Pp
-.It Ic window-active-style Ar style
-Set the style for the window's active pane.
-For how to specify
-.Ar style ,
-see the
-.Sx STYLES
-section.
-.Pp
 .It Ic window-status-activity-style Ar style
 Set status line style for windows with an activity alert.
 For how to specify
@@ -3655,14 +3653,6 @@ command and the
 .Ic aggressive-resize
 option.
 .Pp
-.It Ic window-style Ar style
-Set the default window style.
-For how to specify
-.Ar style ,
-see the
-.Sx STYLES
-section.
-.Pp
 .It Xo Ic wrap-search
 .Op Ic on | off
 .Xc
@@ -3679,57 +3669,34 @@ will generate
 function key sequences; these have a number included to indicate modifiers such
 as Shift, Alt or Ctrl.
 .El
-.It Xo Ic show-options
-.Op Fl AgHqsvw
-.Op Fl t Ar target-session | Ar target-window
-.Op Ar option
+.Pp
+Available pane options are:
+.Pp
+.Bl -tag -width Ds -compact
+.It Xo Ic remain-on-exit
+.Op Ic on | off
 .Xc
-.D1 (alias: Ic show )
-Show the window options (or a single window option if given) with
-.Fl w
-(equivalent to
-.Ic show-window-options ) ,
-the server options with
-.Fl s ,
-otherwise the session options for
-.Ar target session .
-If
-.Ar option
-is given and is not a user option,
-.Fl w
-and
-.Fl s
-are unnecessary -
-.Nm
-will infer the type from the option name.
-Global session or window options are listed if
-.Fl g
-is used.
-.Fl v
-shows only the option value, not the name.
-If
-.Fl q
-is set, no error will be returned if
-.Ar option
-is unset.
-.Fl H
-includes hooks (omitted by default).
-.Fl A
-includes options inherited from a parent set of options, such options are
-marked with an asterisk.
-.It Xo Ic show-window-options
-.Op Fl gv
-.Op Fl t Ar target-window
-.Op Ar option
-.Xc
-.D1 (alias: Ic showw )
-List the window options or a single option for
-.Ar target-window ,
-or the global window options if
-.Fl g
-is used.
-.Fl v
-shows only the option value, not the name.
+A pane with this flag set is not destroyed when the program running in it
+exits.
+The pane may be reactivated with the
+.Ic respawn-pane
+command.
+.Pp
+.It Ic window-active-style Ar style
+Set the pane style when it is the active pane.
+For how to specify
+.Ar style ,
+see the
+.Sx STYLES
+section.
+.Pp
+.It Ic window-style Ar style
+Set the pane style.
+For how to specify
+.Ar style ,
+see the
+.Sx STYLES
+section.
 .El
 .Sh HOOKS
 .Nm