What about a button for Select Fill Tool to conmute easily and quickly a Shape betweem Transparent or Opaque? Imagine, you select a Shape, then press Vissible/Invissible button (maybe a separated buttons for Fills and Outlines) and automatically "Stepped" Keyframes are added in the current frame to mostrate or hide (depending of the actual visibility shape status) the selected shape, not essential, I know, but I think that shoudn't be hard to do (I think...) and could be a very handy function for any workflow , ahmmm... THANKS?
I've been meaning to slap together a few more of my "universal" tools (shape, bone, and camera) and that would be an easy toggle to throw in a generalized shape tool. Hmmm.