+# As of tmux 1.7 mode-mouse has three possible values so we can no
+# longer use an implied toggle.
+bind C-m set -g mouse-resize-pane on \; set -g mouse-select-pane on \; set -g mouse-select-window on \; set -g mode-mouse copy-mode
+bind M-m set -g mouse-resize-pane off \; set -g mouse-select-pane off \; set -g mouse-select-window off \; set -g mode-mouse off