I think any complexity in my explanation is probably inherent to a layers-based graphics program, and probably can't be further reduced. The "tab" part of it wo

I think any complexity in my explanation is probably inherent to a layers-based graphics program, and probably can't be further reduced. The "tab" part of it works exactly the same as every browser in existence. (Are you using an ancient version of Gimp without tabs or single-window mode? The latest is 2.10.) I'm also not sure what you're talking about with right-clicking, since the instructions I gave don't require you to click on the image at all. If ctrl-c on one image, ctrl-v on another doesn't put the first image on top of the second for you, it would probably be helpful to report a bug to the Gimp folks because that's always worked for me and surely ought to work. (Obviously if you're on MacOS or something the key might be different, cmd-c or something.)