I made a mistake in the below image by making the left-pointing arrow too high up, such that the black margins do not align.
I wish to go back and change this "combining paths" action, without undoing any of the changes I made subsequently. It appears there is a "Allow non-linear history" option in the History Panel options. However, I'm not sure if this works retroactively... Furthermore, will switching to this not make life difficult when I DON'T wish to make non-linear edits, but eliminate all changes after the one I am editing?