Organising a scene

After learning how to do everything in toonboom I am attempting my first semi-decent project in toonboom.

However some of the scenes are becoming overwhelmed with objects. Is there some easier way to organise a scene like folders or something.

For example, i create a basic fence piece out and save it as one reusable object in the global libary. Then bring it into my main scene, duplicate it half a dozen times to create a fence line. Now I really want to tuck those drawing away so i don’t have them taking up space in the timeline panel so it is easy to get at the things i am currently editing.

What would people recommend as the best workflow to creating each scene?