I think I have a flawed understanding of multiple things here, so please correct my assumptions. I want a UI that looks the same on all computers, so what I did was create a player that defaults to a specific resolution and doesn't pop up the dialog when you start the game to give you the option to change it: Then, when I develop, I set the aspect ratio to be Standalone 1280x720. When I play my game or edit it, everything looks fine. This is how it looks: But then I gave the game to a beta tester, and when he plays, it looks like this: Given that the game should be running at 1280x720 (major assumption), why would it look different on our two different machines? These UI elements are on a Screen Space - Overlay canvas. Also, what's the best way to test and fix this issue so I don't need players to tell me it looks bad? If I change the aspect ratio in the game view, I can make it look pretty funky, but none of them look like this player's screen, so I worry if I fix it for all the aspect ratios, it may look broke on his machine still.