Manifying Block in Word

[Educator]

When typing sometimes a magnifying block appears in my Word document. I don't
know what I've done for this to appear and I don't know how to turn it off
except by powering down my system.

 

[CyberTaz]

What version of Word, what version of Windows?... and what do you mean by
"magnifying block"?

I don't know of any such feature in Word, itself, although Windows does have
a Magnifier utility. However, there is no keyboard shortcut that would
accidently trigger it & it isn't a standard part of the Accessibility
features. You may have some type of third party software involved, but more
explicit detail would help determine what's going on.