So far I have run into two issues where the C2 fullscreen scaling does not work the way I'd expect it to. Since Ashley confirmed that everything is working as it should, maybe somebody can give me more pointers on how to work with projects at different screen sizes. I have read the appropriate pages on this website but there are not many details to be found.
My expectation was that if I set a 400x400 project window size and enable fullscreen scaling, that the browser would zoom in as much as possible while maintaining the original aspect ratio. E.g. on a 1024x786 screen we'd now have a 786x786 window and all layer relationships remain the same. Clearly that's not the case. I can get this (desired) behavior by changing the Zoom setting inside Chrome and disabling C2's fullscreen scaling. However, I would like to understand C2's algorithm instead. Any pointers ?