We are excited to announce a new feature on the Hub: Favorites!
You can now add resources to your favorites, and organize your favorites into collections!
You can check out the details in our official announcement!
I replied to this in Discord (as FluffyBunny) The answer is that Timeline does let you select the controls and stored variables of other atoms. Look in the dropdown boxes in the Targets tab of Timeline - make sure you're on a recent version ?