Ricoh Aficio 650 Operating Instructions Manual page 141

A
Touch the [Duplex/Combine] key.
B
Touch the [2 Sided] key for original, then touch the [Combine 1 Side] key for
copy.
C
Touch the [2 Pages] key, then touch the [OK] key.
D
Check the orientation.
Combine—Combining Originals Into One Copy
2
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