diff --git a/.tmux.conf b/.tmux.conf
index 728c4b0..860c0fe 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -69,6 +69,9 @@ set -g pane-base-index 1
 # tip from https://github.com/vim/vim/issues/3608
 set -ag terminal-overrides ",xterm-256color:Tc"
 
+# synchronize panes
+bind e setw synchronize-panes ; display "Sync #{?pane_synchronized,ON,OFF}"
+
 
 # tpm install:  git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
 # Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)