Can you insert Markers in the timeline? (To mark central cuts, camera movements, etc.)

Is it possible to add some kind of navigation markers in the timeline to identify when and where to cut, zoom, etc?

You could do things like that in the Xsheet window using Annotation Columns.

http://docs.toonboom.com/help/animate-pro/#HAR/Stage/007_Timing/097_H2_Drawing_and_Typing_in_th.html%3FTocPath%3DToon%20Boom%20Animate%20Pro%20User%20Guide|Toon%20Boom%20Animate%20Pro%203%20User%20Guide|Chapter%207%3A%20Timing|Annotation%20Columns|Adding%20an%20Annotation%20Column|_____1