How do I use the Sleep Mode and Schedule On/Off features to save energy?

To enable Sleep Mode, touch the eco button on the control panel display, touch Sleep, and then select the desired inactivity period after which the printer will enter low-power mode. To use the Schedule On and Off feature, touch the eco button, touch Schedule On and Off, and set the times for the printer to turn on and off automatically. Note that these features are temporarily unavailable if one or more ink cartridges are missing. (Page 15)