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control, the new user has to apply and gain the authorization of the existing user with control. If the logged-in
users are all normal users, the first logged-in user gains the control power automatically. If a higher lever user
logs in later, they can gain the control power automatically. If only one user logs in or the logged-in user is
the user with control, the box is gray.
The picture below (6-28) is the pop-up window when other user send request to the existing user with control.
Log information
The operations on the system are all recorded in log information.
