Magnifier

Windows logo key + Plus Sign (+) or Minus Sign (-)	Zoom in or out
Ctrl+Alt+Spacebar	Preview the desktop in full-screen mode
Ctrl+Alt+F	Switch to full-screen mode
Ctrl+Alt+L	Switch to lens mode
Ctrl+Alt+D	Switch to docked mode
Ctrl+Alt+I	Invert colors
Ctrl+Alt+arrow keys	Pan in the direction of the arrow keys
Ctrl+Alt+R	Resize the lens
Windows logo key + Esc	Exit Magnifier