Once in properties, navigate to the General tab and click Set launch. Now, right-click on NBA 2K20's entry and click on Properties. Launch Steam and click on Library to view all your games.
The file you are looking for is GenshinImpact.exe Alternatively, a custom launcher could be created to allow users to select this setting before launching the game with the custom launch options.
Users can specify the fullscreen window mode by using the standalone player command line argument -window-mode with either exclusive or borderless values when launching the game, e.g., -window-mode exclusive.Users in Steam could set this up.
