Hi Duke, yeah the whole undo mechanism is currently focused on changes to geometry only, background images are in a kind of different category from that.

But yeah that is not unreasonable to want to add a feature for undo to apply to background images as well.

You can only edit background images while you are inside that Image command, so I guess the way undo could work there would be to have an "image undo" available while you were still running inside that Image command.

Then once you exit the command undo would switch back to "Geometry undo" instead.

Would that work?

- Michael