How do you make a picture a background on microsoft works, and type text over top of it?

I found a picture on the internet, and want to use it as a background, on microsoft works. I want to make the picture a background, so that I can type text over it. But don't remember how to do it.

How do you make a picture a background on microsoft works, and type text over top of it?
u gotta paint that ****!