106Chapter 3 How to Use the Printer DriverPlacing the Printer in Sleep ModeImportant• When printing is in progress or an error has occurred, the printer cannot be switched to sleep mode.• The printer enters sleep mode automatically when it has been left idle for a certain period of timeunder normal operating conditions.Note• By default, the sleep timer is set to 4 minutes.• The printer is automatically switched back from sleep mode to online in the following cases:– When the Power key is pressed.– When print data is received.– When cleaning, etc. is performed.1 Make sure the printer is online. (the status lamp is lit.)2 Open the printer driver setup window. ( P.40)