Press Ctrl + Alt + Up Arrow
If that does not work, right-click the desktop
Open Display settings
Find Display orientation
Select Landscape
Click Apply
On some Windows PCs, use Ctrl + Alt + Down Arrow to flip the screen upside down
On some Windows PCs, use Ctrl + Alt + Left Arrow or Ctrl + Alt + Right Arrow to rotate the screen sideways
On a Mac, open System Settings
Go to Displays
Change the rotation setting if available
If the screen is still upside down, restart the computer
If needed, check your graphics control panel for rotation settings