Profile / Features / Messaging Questions?
Yes.When viewing the list of your private messages, select the three dot menu to the right and select “Delete” or “Clear Chat”.
When viewing the chatter's profile, click "Add Friend" in the options menu to send a request to the other person. Until they accept, they will appear as “Pending” in your friends list. Friends list can be accessed from the left menu panel by clicking "Fri ...
You may see your friends in the "friends" tab left hand menu.