Thanks, Greg. This wasn't exactly what I had in mind, but I can make it work. I inserted a Document Property. It doesn't give me the dropdown list I really wanted, but it will suffice.

So the goal of this template is to have specific groups fill in their department name once and have it populate throughout the letter. That's working now, but is there also a way to have a contact's name, email, and phone number appear at the end of the letter once the user types in their department name?