I just noticed that if a Dorico file has been moved mostly or entirely off the screen and one attempts to close the file, the Save Changes…?. announcement comes up off the screen as well. This situation almost caused me to force quit Dorico and lose some changes.
I checked two other applications, Word and Finale, and in both cases the Save announcement and part of the file itself becomes visible in this situation, which seems desirable to me.
(Yes, I know that parking an unused file on the dock would be better than moving it off screen, but sometimes in the heat of battle etc.)