Fedora 31: Still Cannot Get Full Screen in Some Box OSes
Now to be fair, with some OS installations, ie: Ubuntu, I can get full-screen in Boxes, but with others, I cannot, ie: Linux Mint. I too, have perused Google for a solution, with no result. All I get is videos telling me how to install various OS in Boxes, without addressing the full-screen issue.
And, yes, I have looked under Boxes-->Settings, but these appear minimal and also, do not address the issue at hand.
Again, to be fair, I have had a similar issue with VMWare [which I hate] and it offers something called Guest OS 'Tools' which sometimes work and sometimes do not.
Interestingly, this article claims there is a setting for adjusting the screen size, a 'double arrow' under Display, but, for some reason, my version of Boxes doesn't have it.
https://www.lifewire.com/guide-to-gnome-boxes-2202073
I'm thinking it might be a video drive issue--my video card = NVIDIA GEforceGT 625. Video chip = Intel HD Graphics 4400/4600
Thanks!