So I was playing some rpgmaker game and closed it with alt-f4. Guess what happened.

Even googling that is hard. And if a game has a settingmenu and no fullscreen option there, why should I guess that it can do it anyway. Not all games can go fullscreen, there is the normal maximize button and it is an indie game, sooo.

(I was even doing fullscreen with third party tools, because that information is "hidden".Apparatnly that is a plugin most devs activate and it gives f4 a shortcut to fullscreen, without  there being any setting switch. I am talking about borderless windowd fullscreen, as in, maximize without the title bar)