Hi MasterMister,
Thank you for writing to Microsoft Community Forums.
The screen shot which is uploaded is in Windowed mode, we have to change it to immersive mode to enable it in full screen.
I suggest you to follow the steps mentioned below:
- Launch the Minecraft game.
- Select Video settings. This menu will have all the settings for graphics and videos.
- Select Full screen and make sure it is turned on.
You can also check with the following two shortcut keys to enable full screen mode.
- F11
- Alt+Enter
Hope it helps.
Let us know if you got the help you needed by clicking ‘Yes’ or ‘No’.
Roohi Taj S
Microsoft Community - Moderator