Minecraft window is acting strange - can't be maximised?

I was playing Minecraft and tried to take a screenshot but pressed F11 and ever since, my window has been acting weird, not like the normal windows 8 window.
The restore/maximise button is grayed out and I can't just drag it to the top of my screen to make it bigger.
Unlike in the duplicate question, it did not return to normal when I closed out of Minecraft and reopened it. Is there any other way to fix this issue?
Best Answer
I had the same problem a few days ago.
Go into settings, then video settings and there should be an option that says like "start as maximized" (sorry I'm not at my computer right now so I don't know the exact wording). By selecting that option it should toggle to windowed mode. Now if you restart Minecraft you can change the window size.
You can also press F11 to go back into full screen mode but unless you started minecraft in windowed mode you won't be able to change the size if you go back to windowed mode.
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How do I maximize my screen in Minecraft?
When starting Minecraft, click on \u201cOptions\u201d and then select \u201cVideo Settings.\u201d You'll then scroll down a ways until you see the \u201cFullscreen\u201d toggle on the left hand column of options. Click that to \u201cON\u201d and you got yourself a nice, full-screen Minecraft session.How do I reset my Minecraft window size?
Edit . minecraft/options. txt and set the overrideWidth and overrideHeight values to your desired values. This will be the size of the game screen itself (so the actual window will be slightly larger with your OS's borders).Minecraft Windows 10 Edition Let's Play {11} \
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Answer 2
The F11 key toggles full screen. Just press F11 again
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