Control Panel in the Apple color printer printer error signals using status messages, luminous signalling and warning. With the help of a set of control keys, you can perform various functions of the service from Control Panel. There are two modes of operation of the Panel: user and the service. Different levels and types of menus are available in each mode.

For access to the user or service menus, you must turn on the printer offline. You can switch the printer on and offline online by pressing the on-line. The printer is offline, when the line indicator is off and the display reads "00 READY."
Note: * indicates that the print heads are sealed and the printer may be turned off.