Document control ranges, from Dane Jensen.

usr.bin/tmux/tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1044 2026/04/03 09:14:27 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1045 2026/04/04 11:48:00 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 3 2026 $
+.Dd $Mdocdate: April 4 2026 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -5795,8 +5795,13 @@ and a location suffix, one of the following:
 .It Li "ScrollbarSlider" Ta "the scrollbar slider"
 .It Li "ScrollbarUp" Ta "above the scrollbar slider"
 .It Li "ScrollbarDown" Ta "below the scrollbar slider"
+.It Li "ControlN" Ta "on control range N"
 .El
 .Pp
+See the
+.Sx STYLES
+section for information on control ranges.
+.Pp
 The following mouse events are available:
 .Bl -column "MouseDown1" "MouseDrag1" "WheelDown" -offset indent
 .It Li "WheelUp" Ta "WheelDown" Ta ""
@@ -6609,6 +6614,7 @@ replaces the previous saved default).
 .Ic range=window|X ,
 .Ic range=pane|X ,
 .Ic range=user|X ,
+.Ic range=control|N ,
 .Ic norange
 .Xc
 Mark a range for mouse events in the
@@ -6655,6 +6661,19 @@ will be available in the
 format variable.
 .Ql X
 must be at most 15 bytes in length.
+.Pp
+.Ic range=control|N
+is a set of ranges for users to define custom behavior.
+.Ql N
+can be 0 through 9.
+When a mouse event occurs in the
+.Ic range=control|N
+range, the
+.Ql ControlN
+key binding is triggered.
+See
+.Sx MOUSE SUPPORT
+for details.
 .It Ic set\-default
 Set the current colours and attributes as the default, overwriting any previous
 default.