Start a new session or open one of your previously created sessions
New session- opens Main working area from where you can start creating a new session or connect with one of your contacts.
Saved Sessions- allows you to access, manage or edit previously saved sessions.
Scheduled Sessions - allows you to schedule a session (acting as a host) or join a session with one or more of Reacts contacts (as attendee).
To learn more about Scheduled Session, please see : How to schedule an event