diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index 07155ee..2caaad0 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -65,6 +65,9 @@ bind -r Down resize-pane -D 5
 bind > swap-pane -D
 bind < swap-pane -U
 
+# synchronize panes with S
+bind S set-window-option synchronize-panes \; display-message 'Synchronize-panes #{?pane_synchronized,on,off}'
+
 ## WINDOWS
 # Windows start at 1 not 0
 set -g base-index 1
@@ -108,4 +111,4 @@ set-option -g display-panes-colour brightred
 set-window-option -g clock-mode-colour brightgreen
 
 # bell
-set-window-option -g window-status-bell-style fg=black,bg=red
\ No newline at end of file
+set-window-option -g window-status-bell-style fg=black,bg=red