How to Fullscreen Undertale Yellow
Best Answer
To fullscreen Undertale Yellow, just press F4 on your keyboard while the game is running! Simple, right? Happy gaming!
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Hey there! Just hit F4 while you're in the game, and you'll be in fullscreen mode instantly!
From my experience, pressing F4 usually works, but if it doesn't, try Alt+Enter as a backup!
Fullscreen mode? Just press F4. Trust me!
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