Example: Show or Hide any Object on Cue with a Trigger
Little known neat trick: Setup triggers to dynamically cue entry and exit of objects. Once setup, you can cue entry and exit as often as you want.
You can even cue entry and exit of the same object with cue points on the timeline. Check out the second slide. There isn't any timeline animation spanning the timeline, right? The seekbar tells a different story.
The secret is adding your object somewhere on the timeline where the exit animation won't be triggered after your show animation has been triggered. I added them at the beginning in this example. In SL2, your object time span needs to be as long as your exit and entry spans or it'll shorten them automatically. In SL1, you can make your object span really short without entry / exit time compression.