My screen is suddenly divided into 9 numbered areas?

[Doc69]

My screen is suddenly divided into a 3x3 matrix of 9 numbered areas. It only affects one of my spaces. My eight other spaces are not affected. What's going on and how do I get rid of it?

http://postimg.org/image/7i8h27j3f/

I have a 5,1 Mac Pro running 10.10.5.

 

[Doc69]

I figured it out. It was related to Dragon (Dictate) 5. I must have accidentally hit a keyboard shortcut. When I closed the program, the numbered matrix went away.