To configure a scene so that it can be toggled on/off in the scene directory, open the options window for the scene and look for an option called “action at end of scene”. Choose one of the following options that provides "toggle-like" functionality:
Add Release End Cue: The scene will release when played if it is already onstage. This option allows for the scene to be manually toggled on/off by pressing its cell in the scene directory when guard is turned off.
Auto-Release at End: The scene will automatically release after its crossfade is complete. This option is useful for users who want to trigger a scene and have it automatically release on its own. To extend the period for which a scene is in playback before it is automatically released, record a dummy desk channel into the scene with a cross fade that is equal to the length of time you want the scene to be onstage before it releases.