Next to the Conversation name or message, click .
To view your favorite Conversations, navigate to the list of Conversations (from the navigation menu on the left, select Conversations), click Show, then click Favorites.
To view all your favorites, including messages, from the navigation menu on the left, select Favorites.
You can filter or sort your favorites to change your view.
To filter your favorites by object type (for example, messages, documents, or groups), select an option from the Show menu.
To sort your favorites, select options in the Sort by menu: sort by options (Date Added or Name), and the order you want them sorted in (Ascending or Descending).