I have written this information once before. I’m re-posting it for those who hadn’t read it.
The Laptop screen rotates 90 degrees on you. In most cases you wouldn’t want this to happen on purpose, but there are a few times that reading something might be easier with a long screen to read top to bottom rather than scrolling. Whichever the case, here are the key combinations to make this happen or fix a problem that you may have ran into with this.
CTRL+ALT+<RIGHT ARROW KEY> – rotates it by 270 degrees
CTRL+ALT+<LEFT ARROW KEY> – 90 degrees
CTRL+ALT+<DOWN ARROW KEY> – rotates it 180 degrees
CTRL+ALT+<UP ARROW KEY> – Takes it back to the original position
It sure would make a great prank to play on a friend.

