OK, thanks for explaining. But I am still a bit confused. Normally you would just add a blank drawing (frame) – and then draw on that.
Also if something is to be held, you just drag down (from the original) to produce a number of clones. Also you can have one part holding on one layer and another part moving frame by frame on a second layer – like if you had a still standing body (on layer 1) and a head (on layer 2) looking around and moving.
I am not sure why you would keep copying the previous drawing?