When you go into the ‘Editor Preferences’ and set the ‘Standalone Window Size’, there is another field called, ‘Additional Launch Parameters’ where you need to enter ‘-Fullscreen’ which will launch your standalone game into fullscreen mode.
When you go into the ‘Editor Preferences’ and set the ‘Standalone Window Size’, there is another field called, ‘Additional Launch Parameters’ where you need to enter ‘-Fullscreen’ which will launch your standalone game into fullscreen mode.