I made a comment about it but i thought i’d mention it as its own thread.
In flash when you pick a graphic you can use keyframecaddy to give a thumbnail view of it (same as a drawing layer).
However there it gives you a thumbnail list with multiple rows of the drawings, and you can easily see what they are and quick click them (super great for eyes or mouth when you have a lot of them).
In comparison in toonboom i have to drag the slider or use [ ] to get the mouths i need, and it takes a ton more time when i have to go back and fourth 10 drawings to get the mouth or blink i need instead of just having a thumb i can quick click and move frames back/forward with < > keys.