diff --git a/sh/tmux.sh b/sh/tmux.sh
index 1cee763..6c7a1e3 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -35,7 +35,12 @@ set-option -g status 3
 # enable title
 set-option -g set-titles on
 # set title to working directory
-#set-option -g set-titles-string ''
+set-option -g set-titles-string '\
+tmux / \
+#{session_name} / \
+#{window_index} #{window_name} / \
+#{pane_index} #{pane_width}×#{pane_height}\
+'
 
 # status bar
 set-option -g status-bg black