In UI builder I made a layout for my 1920 x 1080 screen. The UI Builder shows exactly the way I want it. If I have Unty open on a full HD monitor everything in the game view looks as expected. However, I use unity on a 49 inch (5160 x 1440) resolution, I also had the same issues when working on a 29 inch (2560 x 1080) monitor.
The Match Game View option only seems to resize the document to whatever the current game size is when editing the document. The Panel Settings-> Scale Mode needs to be set, I think, to Scale With Screen Size.
But, you’re going to have a problem with resolutions that are too wide or too narrow, but I don’t have a good suggestion for how to deal with that.
