making your computer screen reverting

making your computer screen reverting in all directions.

    The keyboard shortcut for this 

• Ctrl +alt+right arrow        >            reverts your screen into 90 degrees.
• Ctrl +alt+left arrow          >           reverts your screen into -90 degrees.
• Ctrl +alt+down arrow      >            reverts your screen into 180 degrees.
• Ctrl +alt+ up arrow          >            reverts your screen into 0         degrees (meansoriginal position)