I turned on full screen mode on MacOS and there does not appear to be a way to turn it off. In full screen mode, I am not seeing the MacOS red, yellow, green window controls. There do not appear to be any independent "settings", nor any "right click" options for window control. I'm calling this UX/Design rather than Mac because the UX/Design principle should be to use OS conventions when available, rather than inventing yet another convention.