diff --git a/dot_tmux.conf b/dot_tmux.conf
index dd12d35..b3bd001 100644
--- a/dot_tmux.conf
+++ b/dot_tmux.conf
@@ -11,7 +11,8 @@ set -g status-interval 2
 # enable mouse
 set-option -g mouse on
 
-# remap prefix key to Ctrl+S
+# remap keys
+# prefix key: Ctrl+S
 unbind C-b
 set-option -g prefix C-s
 bind-key C-s send-prefix