I am brand new to Outlook but have used other mail handlers. I do like
Outlook but am having trouble with what I think should be a simple (and
intuitive) operation.

I have assigned a Category to each of my 500 contacts. (Some people are in
multiple categories.)

I want to create a mail list of just those people in (let's say) category
"Demo."

I cannot figure out where to go just to create that mail list. (Or stated
another way, I want to send a letter to just those folks in the Demo
category. How do I do that?)

Roy