JavaScript would be one answer, but you might not need to code to solve this problem.
Basically, your timeline would have the following…
- The beginning
- The animation of an expanding button
- the stopping point of the animation (A timeline action pauses the animation)
On the very next frame, just put another timeline action — so the timeline can be played in reverse.
Maybe I’ll make a template of this for the next Free Templates… Free Hype Templates [New “Eclipse” Template] 🌞