Help, can't find how to delete my private messages in case my box gets full.

[Tacenda]

Since the board change I'm a little lost.  I went to my profile, and other places and couldn't find the messages, and the ability to delete old ones.  

[Calm]

Look at top righthand corner.  There is a letter icon.  That takes you to your inbox.  Select which messages you want to delete, a trash icon comes up, hit and they go.