From this window, we can change the orientation of the screen
If we have multiple displays on our computer, we can select from the list above. In our case, we have only one monitor, labeled '1'. If we have any other monitors, we can just click them and change the orientation.
Once we have chosen it and clicked 'OK', the screen will flip
It will then ask whether we want to keep these changes or cancel them. If we click cancel, we will be brought back to the orientation we had originally. If we click 'Keep Changes' then that orientation will remain. We can now close this window.