===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/tmux.1,v
retrieving revision 1.755
retrieving revision 1.756
diff -c -r1.755 -r1.756
*** src/usr.bin/tmux/tmux.1	2020/05/16 14:34:44	1.755
--- src/usr.bin/tmux/tmux.1	2020/05/16 14:39:40	1.756
***************
*** 1,4 ****
! .\" $OpenBSD: tmux.1,v 1.755 2020/05/16 14:34:44 nicm Exp $
  .\"
  .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
  .\"
--- 1,4 ----
! .\" $OpenBSD: tmux.1,v 1.756 2020/05/16 14:39:40 nicm Exp $
  .\"
  .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
  .\"
***************
*** 5556,5561 ****
--- 5556,5565 ----
  .Ic terminal-features
  option should be used.
  .Bl -tag -width Ds
+ .It Em \&AX
+ An existing extension that tells
+ .Nm
+ the terminal supports default colours.
  .It Em \&Cs , Cr
  Set the cursor colour.
  The first takes a single string argument and is used to set the colour;
***************
*** 5568,5575 ****
--- 5572,5590 ----
  .Ed
  .It Em \&Cmg, \&Clmg, \&Dsmg , \&Enmg
  Set, clear, disable or enable DECSLRM margins.
+ These are set automatically if the terminal reports it is
+ .Em VT420
+ compatible.
  .It Em \&Dsbp , \&Enbp
  Disable and enable bracketed paste.
+ These are set automatically if the
+ .Em XT
+ capability is present.
+ .It Em \&Dsfcs , \&Enfcs
+ Disable and enable focus reporting.
+ These are set automatically if the
+ .Em XT
+ capability is present.
  .It Em \&Smol
  Enable the overline attribute.
  .It Em \&Smulx
***************
*** 5620,5625 ****
--- 5635,5645 ----
  option above and the
  .Xr xterm 1
  man page.
+ .It Em \&XT
+ This is an existing extension capability that tmux uses to mean that the
+ terminal supports the
+ .Xr xterm 1
+ title set sequences and to automatically set some of the capabilities above.
  .El
  .Sh CONTROL MODE
  .Nm