I think ensign means the "PM" button amongst what used to be at the top.


Now at the top (under the top nav graphic + section title in blue):

Forum Search | FTR Chat (IRC) | Member List | Usergroups | Profile | You have no unread messages

Those are all clickable. The last one, on the right, is what you're looking for.


In general, if you see text in that smaller, blue font, it's a button.