How to Open Undertale in Fullscreen
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I always maximize the game by pressing Alt + Enter. Works like a charm!
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Just press F4 on your keyboard during the game to toggle fullscreen on or off. Easy peasy!
Try using the F4 key! It instantly switches Undertale to fullscreen mode. You can also exit fullscreen by pressing it again.
Um, F4. That's it. You're welcome.
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