One user can start a session, offer it to other users, and then allow those users to take control of the session. The following procedure applies to the user who has been allowed to join a session. When you take control, your keyboard and mouse provide input to the session, and the user from whom you took control stops providing input.
NOTE:This option is available only if the user who started the session has selected Allow users to take control of session.
To take control of a session in X Manager for Domains
Under Offered Sessions, right-click the session name and then select Join.
Right-click the session and select Take Control.
To take control X Manager (standalone)
Choose Action > Join, and then enter the connection URL provided by the user who shared the session.
Under Joined Sessions, right-click the session and select Take Control.