diff --git a/example_tmux.conf b/example_tmux.conf
index 54de4d6b..0058ceee 100644
--- a/example_tmux.conf
+++ b/example_tmux.conf
@@ -49,11 +49,15 @@ bind F10 selectw -t:19
 bind F11 selectw -t:20
 bind F12 selectw -t:21
 
-# Keys to toggle monitoring activity in a window, and synchronize-panes
+# A key to toggle between smallest and largest sizes if a window is visible in
+# multiple places
+bind F set -w window-size
+
+# Keys to toggle monitoring activity in a window and the synchronize-panes option
 bind m set monitor-activity
 bind y set synchronize-panes\; display 'synchronize-panes #{?synchronize-panes,on,off}'
 
-# Create a single default session, because a session is created here, tmux
+# Create a single default session - because a session is created here, tmux
 # should be started with "tmux attach" rather than "tmux new"
 new -d -s0 -nirssi 'exec irssi'
 set -t0:0 monitor-activity on