On the machine when a 2 sided document is inserted in the document handler, select the 2x2 button on the console. Press the start button and the machine will feed the document in, and do a reverse of the document for the second scan. In the paper feeder, the machine feeds the paper in and reversed the copy back into the machine, flips the copy then feeds the copy back for the second side to be copied. If you do not have a m20i, the lower model numbers will not do two sided copies.
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On the machine when a 2 sided document is inserted in the document handler, select the 2x2 button on the console. Press the start button and the machine will feed the document in, and do a reverse of the document for the second scan. In the paper feeder, the machine feeds the paper in and reversed the copy back into the machine, flips the copy then feeds the copy back for the second side to be copied.
If you do not have a m20i, the lower model numbers will not do two sided copies.