Menus

Its been a while, but I'm thinking Presenter has/had a feature that allowed you to customize the left menu so either appear or hide automatically based on the slide displayed. As I recall, we'd use this feature to set up a course so the menu displayed until the learner arrived at a demo slide (mini captivate) at which time the menu would collapse so that full real estate was available for the demo. Is this customization available in Storyline? I've looked through the Heros tutorials and I"m not finding anything specific to this. TIA