I've got a question: Is there any way to resize sprite sheets already being used in symbols without having to go back into those symbols and edit their Background Image width and height? Is there a way to work with sprite sheets in AE that allows you to change the size of those sprite sheets without it messing up the appearance of the symbols where those sprite sheets are the source image?
Similarly, is there a way to edit the number of rows and columns in a sprite sheet that's already been imported as a symbol? Basically, my question is that I'm creating a large number of animations and I want to know if I'll be able to add additional cells to the sprite sheets later on, if need be. Seems that having that kind of flexibility would be very useful to have, but I haven't found any indication that this is possible.