Autopilot: Manage your contacts using lists, smart segments and folders
The contacts "tree" is the section on the left in the Contacts app which allows you to view and manage your lists, smart segments and folders. Please watch the video below to learn more:
It provides a general overview of the contacts tree, including the "Recently Viewed" and "Team Favorites" features, as well as the "Modify" option, which allows you to change the layout of the contacts tree.