How to Make Undertale Screen Bigger
You can make the Undertale screen bigger by pressing F4 on your keyboard, which switches between fullscreen and windowed modes!
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Hey, I had this issue too! I went into the game settings and adjusted the resolution settings there. Worked like a charm!
Undertale looks best in pixelated glory, but if you really need it bigger, just crank that Alt + Enter combo.
If F4 doesn't work for you, try pressing Alt + Enter together. It should toggle fullscreen mode on and off.
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