Using Shared Tracks with Masks and Keyframes
IgorB provides a nice demo to demonstrate the potential of Shared Tracks with masks.
The video shows how to use shared tracks to work with masks and keyframes. It also shows how to view all the masks of a track at the same time or remove them from the view so as not to hinder other editing operations (Attention: to work with masks and keyframes there must be no In/Out Point on the timeline!).