UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support How to add Subtopics

I am working with a test site of the new Threads (7.02). I can't seem to find where I add subcategories (or subtopics) to my boards. Here is the curret status. I have installed 7.02 to my backup server and imported all the data from my working server ((6.5.5)

What I want to do is the following:
Have a category called "Post your picks" and then have SUB-categories within that for FOOTBALL, BASEBALL, BASKETBALL....etc etc. Can someone give me a jumpstart so I can start wrking with this problem?

Thanks

Musky