How to fix this Minecraft Fullscreen issue?

I just purchased a new computer and decided to play a game on Minecraft. However the graphics in game look a little weird when I full screen. When it's minimized in a smaller window it looks normal. Anyone know anything about this?

Using a 4k monitor by Samsung and a MSI RTX 2060

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Solution 1:

Do you mean the menus and GUI being small? Go to video settings and change GUI Scale to medium or large.

Solution 2:

You may want to try tampering with your Fov (Field of View) setting until you get it to the right look for the size and shape of the screen.