Scrolling panel and boxing figure

Good afternoon everyone.

I'm showing a large picture in a scrolling panel, and I intend to have clickable buttons that highlight different sections of a that picture. I'm trying to figure out the best way to go about doing this. Ideally, I'd use layers for the highlighting, but you can't have different layers interact with a scrolling panel. They'll just show highlights wherever they appear on the layer, rather than where they are on the figure.

I can use a hidden state for the highlights, that flips to normal when you hit a button, but how would I go about removing the highlight if you click a different button? I can manually add "Set object 1 to hidden" on object 2, but if I have 10 highlights on a screen, that gets VERY cumbersome very quickly. Any advice? Thanks for your help.