Command Pattern for undo/redo in paint application

Question

I would like to implement undo/redo in a small paint application. It seems the Command Pattern fits the use nicely, but I am unsure how to best implement it.

As I unders

Answer 1

Maybe, it would be better not to store copy of entire image in command, but store only copy of area, which is changing by command. Of course, this is not a panacea