How to Enlarge Undertale Screen
For a bigger screen experience, hit the F4 key, it toggles between windowed and fullscreen modes.
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Just press F4 during the game to switch from windowed to fullscreen mode. Enjoy the bigger view!
Just use F4, good to go!
Alt+Enter works too if F4 doesn't do the trick. Happy gaming!
My experience: F4 is the magic key that fixes everything. Fullscreen mode rocks!
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