1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.1 b/tmux.1
index 9dd2065e..7cb880ed 100644
--- a/tmux.1
+++ b/tmux.1
@@ -3781,6 +3781,7 @@ The following variables are available, where appropriate:
 .It Li "pane_tty" Ta "" Ta "Pseudo terminal of pane"
 .It Li "pane_width" Ta "" Ta "Width of pane"
 .It Li "pid" Ta ""  Ta "Server PID"
+.It Li "rectangle_toggle" Ta "" Ta "1 if rectangle selection is activated"
 .It Li "scroll_region_lower" Ta "" Ta "Bottom of scroll region in pane"
 .It Li "scroll_region_upper" Ta "" Ta "Top of scroll region in pane"
 .It Li "scroll_position" Ta "" Ta "Scroll position in copy mode"