[REQ] patch-togglable IMAGE/PDF that is NOT a background

We need to be able to have a patch-togglable IMAGE/PDF that is NOT a background.

For example, there are some songs that I'd like to have a "crutch sheet" up for tricky arrangements but I don't need this "blank" area to display on every patch. I'd create a key-toggle to show or hide it.

Why can we only have a BACKGROUND Image/PDF?

This seems to be a bit short sighted for gigging musicians, in my opinion.