Press [Original Feed Type].
Specify the original orientation.
Select the readable orientation or unreadable orientation according to the orientation in which you place the original.
Press [2 Sided Original].
Select [Top to Top] or [Top to Bottom].
Select [1st Sheet] or [2nd Sheet].
Select [2nd Sheet] if you want to send a cover sheet as the first page.
Press [OK].
For details about acceptable original size and paper thickness for two-sided scanning with the ADF, see "Recommended Original Sizes and Weights", Paper Specifications and Adding Paper.