Categories in Today Agenda/Calendar

[j joy j]

So I can download and change and edit my Treo 700w with all the awesome programs and things you people come up with but for the life of me, I can't figure out how to delete some of the categories in my Calendar/Today Agenda. You know how you can set a cat up for your appointments? I can see how to add a new cat but can't figure out how to delete one? I got to be missing something simple! Thanks!