===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/tmux.1,v
retrieving revision 1.57
retrieving revision 1.58
diff -c -r1.57 -r1.58
*** src/usr.bin/tmux/tmux.1	2009/08/04 18:41:28	1.57
--- src/usr.bin/tmux/tmux.1	2009/08/04 18:45:57	1.58
***************
*** 1,4 ****
! .\" $OpenBSD: tmux.1,v 1.57 2009/08/04 18:41:28 jmc Exp $
  .\"
  .\" Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
  .\"
--- 1,4 ----
! .\" $OpenBSD: tmux.1,v 1.58 2009/08/04 18:45:57 nicm Exp $
  .\"
  .\" Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
  .\"
***************
*** 1021,1032 ****
  Commands which set options are as follows:
  .Bl -tag -width Ds
  .It Xo Ic set-option
! .Op Fl gu
  .Op Fl t Ar target-session
  .Ar option Ar value
  .Xc
  .D1 (alias: Ic set )
  Set a session option.
  If
  .Fl g
  is specified, the global session option is set.
--- 1021,1037 ----
  Commands which set options are as follows:
  .Bl -tag -width Ds
  .It Xo Ic set-option
! .Op Fl agu
  .Op Fl t Ar target-session
  .Ar option Ar value
  .Xc
  .D1 (alias: Ic set )
  Set a session option.
+ With
+ .Fl a ,
+ and if the option expects a string,
+ .Ar value
+ is appended to the existing setting.
  If
  .Fl g
  is specified, the global session option is set.
***************
*** 1310,1322 ****
  window option is enabled.
  .El
  .It Xo Ic set-window-option
! .Op Fl gu
  .Op Fl t Ar target-window
  .Ar option Ar value
  .Xc
  .D1 (alias: Ic setw )
  Set a window option.
  The
  .Fl g
  and
  .Fl u
--- 1315,1328 ----
  window option is enabled.
  .El
  .It Xo Ic set-window-option
! .Op Fl agu
  .Op Fl t Ar target-window
  .Ar option Ar value
  .Xc
  .D1 (alias: Ic setw )
  Set a window option.
  The
+ .Fl a ,
  .Fl g
  and
  .Fl u