Adding a contact to your directory creates a shortcut that makes it easier to add this person when creating a discussion thread. Make sure to add your most frequent collaborators to your directory!
All your friends will be automatically added to your directory.
From Network page, search for the participant you want to add to your directory.
Select the participant to open their profile.
Click Add to My Directory.
The contact is now added to my directory. I can remove them if needed.
All participants in my directory are displayed on Network page under Contacts.