Deleting a collection on Kobo Aura HD

Hi folks. Thanks for the great forums. Came for the coupons, stayed for the forum discussions.

I have a new Kobo Aura HD (just a week or two) and I have a question about collections (not using Calibre yet so collections were created directly on the ereader).

I want to delete a collection that I no longer need. I have removed all the books from it, and added them to new collections (I like making lists!) and now I want to get rid of the empty collection, but I can't quite figure out how. I've read the manual, and I've clicked (pressed?) around and there doesn't seem to be such an option.

Any help appreciated. Thanks.