In V5, where can I see the participants and attachments of a discussion thread? How do I add other people?

1. Enter a keyword in "Search topic name" on the left and click the discussion thread you want to view. 2. In the "Discussion info" section on the right, check "Participants", "Created by", and "Loaded attachments". 3. If you want to add other people to the current discussion, click "Add participants" on the right.