Can I use different sized windows

I am making a game with several levels using a different layout for each level. Is it possible to use different window sizes for different layouts within the same project. haven't been able to but if anyone else know a way I would be very appreciative.

I dont think you can. Window Size is set on a project level. What is it you want to achieve by having different window sizes? Maybe you can achieve that in another way.

The levels are based in a city setting one of the levels is inside of a small storage building for a cqc (close quarters combat) based level.