I have been decluttering my PM messages by archiving them. But sometimes, after archiving, I may find myself needing to see them again or unarchive them.

For incoming messages, no problem. I press the "Switch to Archived" button, and there they are.

But I haven't figured out how to do this for messages I have sent. There is no equivalent control for Outgoing Messages that I can find. Once I have archived outgoing messages, there is no apparent way that I can see to get access to them ever again. Unless the recipient has responded, in which case a copy of my sent message appears in the incoming message, I don't know how I can see the messages I have sent in the past.

How do I get access to my archived outgoing messages?

Any help would be most appreciated, thank you.