About ECO settingsThis setting allows you to use automatic duplex printing as a default to save paper and to turn the machineon/off automatically to save electricity.Using Duplex PrintingTurning on/off the machine automaticallyImportant• Depending on the setting item, authentication by the administrator password is required.About the Machine AdministrationIf you do not know the administrator password, ask the administrator of the machine you are using.Using Duplex PrintingFollow the procedure below to use duplex printing.1. Make sure that the machine is turned on.2. Select ECO settings on the HOME screen.LCD and Operation Panel3. Select Two-sided printing setting, then press the OK button.4. Use the button to change the setting item, use the button to change the setting,then use the OK button to confirm the selection.1. CopySets two-sided copying as a default.2. PDF file printSets duplex printing of PDF files saved on a USB flash drive as a default.3. FAX printSelect two-sided printing of sent/received faxes, reports, or lists as a default.266