Press [Original Settng].
Press [Original Size].
Specify the original size, and then press [OK].
Select the original orientation, and then press [OK].
Press [Dup./Combine/Series].
Press [Series/Poster].
Select [2 Sided 1 Sided] or [Spread 1 Sided], and then press [OK].
If you specified [2 Sided 1 Sided], you can specify the orientation. For details, see Specifying the Original and Copy Orientation.