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.
Rect Tell tmux that the terminal supports rectangle operations.
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.
