diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index 49864bb..8e8adcc 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -10,6 +10,7 @@ unbind '"'
 unbind %
 
 # enable mouse control (click wind, panes, resizable panes) - as of tmux 2.1
+# copy/paste: shift+left click to highlight, then shift+middle to past
 set -g mouse on
 
 # stop tmux from renaming the window every time you run a command