diff --git a/INSTALL/Docker/tmux.conf b/INSTALL/Docker/tmux.conf
index 910b88f..dce8e61 100644
--- a/INSTALL/Docker/tmux.conf
+++ b/INSTALL/Docker/tmux.conf
@@ -9,6 +9,9 @@ set -g status-style bg=blue,fg=black
 setw -g window-status-current-style bg=black,fg=white
 setw -g mode-keys vi # https://blog.sanctum.geek.nz/vi-mode-in-tmux/
 
+# toggle mouse on/off using <prefix> v for external copy/paste functions
+bind v set -g mouse
+
 # use <prefix>:list-keys to check current key bindings
 bind -n MouseUp1StatusDefault split-window -h # left click empty space in status bar
 bind -n MouseUp1Border next-layout # left click pane border to change layout