For a long time now, several people have voiced opinions on wanting to have layer groups in the After Effects Timeline. We even covered it a while back and included a mockup of how it might work. Well, the good people of Goodmotion—pun intended—have just previewed something they’ve been working on: GM FoldLayers.
Glad you like it! It's now available for OS X from http://www.goodmotion.se/?page_id=702.
Can't wait for the 20th to roll around so us Windows guys can start folding.
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