When you first open the app an opinion menu open up and you'll Find the list of screen resolution (The number x number list) right under that box is a little checkmark box with the word windowed next to it you click it(picture with windowed circled
Hellp I just downloaded the imac one and I cant figure out how to get out on the screen it says alt enter to toggle fullscreen but when I press that nothing happened
I found the windowed thing to click so I can now control it
