[palosanto]

I use always full screen mode and have lots of stamps because I made fingering numbers as stamps as they are faster to apply than text.
Shifting everything would be a disaster.
However you said that stamps shift to the "correct" position when exporting a song or switching to fit screen.
I export songs often as pdf with annotations and they seem to remain in the same position as when I see them onscreen, I don't see any shift (unless it's just a couple of pixels and I wouldn't be able to tell).
I haven't noticed any shift switching to fit screen either ...

In any case, to be safe, I would prefer the second option.

Thanks,
Juan