Actually this will be covered, I believe, by our annotations feature (to come soon). You will be able to write (scribble) notes, like numbers with key-circles, charts and everything else in the row “annotations” in the x-sheet. Also you can drag this row over next to any other row (layer) and even link it, so when you alter anything timingwise in your animation, your scribbles (line for line) in the annotations row will follow their respective drawings.