How do I create two-sided documents from the glass?

To use the duplex feature from the machine's glass:

• Place the original on the glass
• Press "2-Sided Copy" on the LCD screen
• Select the two-sided mode you wish to use: "1-2", "2-2", or "2-1"
• Press "OK" on the LCD screen
• Press the "Start" button on your device
• After the first side has been scanned, flip the document over or place the second original on the glass, and press the "Start" button on your device
• When you have finished scanning all originals press "Read-end" on the LCD screen