How to use Magnifier on Windows 10
Using Magnifier on Windows 10
Magnifier makes part or all of your screen bigger so you can see words and images better.
To quickly turn on Magnifier, press the Windows logo key 
+ Plus sign(+)
To turn off Magnifier, press the Windows logo key 
+ Esc .
If you prefer using a mouse, select
Start
> Settings > Ease of Access > Magnifier > Turn on Magnifier.
If you want Magnifier to read your screen aloud, see here: How to use Magnifier reading (microsoft.com)