- Words at the top which read "Here are the newsletters you are subscribed to."
- Either put checkmarks in the "subscribe" checkboxes to indicate that you're subscribed. (Unsubscribe by unchecking.) --or--
- Change the heading to say "Unsubscribe" above the checkboxes.
Just in case I misunderstood what I was supposed to do, I did go and mark the newsletters as junk/spam.