Triggers re Next Button
I have a slide that plays audio, and at specific points in the audio, goes through an animation where it shows content on other layers and then returns back to the base layer. There is no user interaction with the objects based on the client's request. I want that when a user plays the slide the first time, the next button is disabled until the audio finishes... which I have successfully done with two triggers: 1) Change state of next button to disabled state when timeline starts, and 2) Change state of next button to normal state when timeline ends.
However, when a user revisits the slide, I don't want that restriction on the next button to be there. I want the user to be able to advance at their leisure. Is there another trigger I can set up that would accomplish this?