From the home screen, touch the application icon.
Depending on your printer model, do either of the following:
Touch Eco-Mode.
Touch > Eco-Mode.
Change one or more of the following settings:
Two-Sided Printing—Print on both sides of the paper.
Quiet Mode—Reduce the noise produced by the printer. Quiet Mode may reduce the processing speed, which may delay the print time of the first page.
Sleep Mode—Set how many minutes before the printer goes into a low-power mode.
Screen Brightness
Toner Darkness—Set the darkness of the printed documents.
Touch Save.