diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index e1f23b1..a3dbf4e 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -6,6 +6,9 @@ unbind C-b
 unbind C-a
 set -g prefix C-a
 
+# turn pane sync on/off
+bind -r y setw synchronize-panes
+
 # reload configuration
 bind -r r source-file ~/.tmux.conf