[Evolution] Selecting Topics

["Mr. J" <comlbox sonic net>]

I'm sure I'm overlooking something, but, on my Mailing List Membership
Configuration page there's a box titled "Which topic categories would
you like to subscribe to?" Neither when I signed up initially, nor now
do I see a way to select those topic categories.  The right-side small
box says: "No topics defined." 

As a result, I'm getting every message posted to the list.  

No offense to others, but please tell me how to define a topic
category.

Thanks
Ira