Windows Magnifier  

To Turn on, click on the Windows Logo Key and while holding it press the key with the plus sign on it.

To make it even larger, keep holding the Windows Logo Key  and press the key with the plus sign on it again (and again) as needed.

To reduce the size , click on the Windows Logo Key and while holding it press the key with the minus sign (hyphen) on it.

To Turn off, click on the Windows Logo Key and click on Esc.

The Windows Logo key is at the bottom of the keyboard.On most keyboards, this is to the left of the alt key.

The key with plus and minus - located on the numeric row on the keyboard, to the right of the key with zero on it.