You do ctrl alt and any arrrow key but the up one, (up is to get it back to normal) this trick only will work on some computers
To rotate your computer screen, use these keys: Ctrl + Alt + Arrow key. Hold all of those keys at the same time to rotate your computer screen and have it face any direction you want. Ctrl + Alt +...
Simply hold down ctrl alt and the arrow keys
hold down the CTRL + ALT keys and press the cursor keys (arrows) on your keyboard
I don''t think anything happens to it if you don't press it to hard otherwise it might break.