C-Q as prefix. C-Q z ignores mouse. C-Z e enables it back

tmux/tmux.conf

@@ -1,4 +1,7 @@
 # https://gist.github.com/spicycode/1229612
+unbind C-b
+set -g prefix C-q
+bind C-q send-prefix
 # 0 is too far from ` ;)
 set -g base-index 1
 
@@ -11,7 +14,7 @@ set -g status-keys vi
 set -g history-limit 10000
 
 setw -g mode-keys vi
-set -g mouse on
+set -g mode-mouse on
 setw -g monitor-activity on
 
 bind-key v split-window -h
@@ -33,6 +36,10 @@ bind j select-pane -D
 bind k select-pane -U
 bind l select-pane -R
 
+# mouse mode on-off
+bind e set -g mode-mouse on
+bind z set -g mode-mouse off
+
 # Use Alt-vim keys without prefix key to switch panes
 bind -n M-h select-pane -L
 bind -n M-j select-pane -D