We're all about community and sharing information.  So, we've added one more method to assist you.  You can now do multi-person messages.   Here are the steps. 

Step 1: In your conversation, click the caret key:   (which is Shift-6).

Step 2: Enter the name of the person you wish to add in the find members windows.  

Step 3: Click "add to chat" on the right side to include the person 

You'll see the person's name listed at the top of the discussion.