Separate timeline position for each piece

Sometimes I’m drawing something static like a landscape or something where I only have one frame but many layers, in which case I like having the timeline on the right. But then, if I get bored, and decide to switch over to an animation for a character or something like that with only a few layers but far more frames, I have to reposition it to the bottom. So can there be an option to have seperate timeline positions for each piece? Thanks.

this is a very specific request…