I see, the problem I was having with that was that when re-showing a screen, it repositioned it to it's default origin, so I was hoping for something that would just show the label's contents within the screen.
HOWEVER, I ended up using "renpy.call_in_new_context" in a function and called that function within the imagebutton and it did pretty much exactly what I wanted. I did still end up putting it all on the master layer like you said, just in case.
Thanks again, you've been a big help!