Ricoh Pro C901s Operating Instructions Manual page 22

Book 2 Sided
Copies a two-page spread original onto one sheet with one page per side.
See p.206 "Booklet/Magazine".
Front&Back
Copies each two-page spread original as it is onto both sides of a sheet.
See p.206 "Booklet/Magazine".
20
2 Sided
BZH039
BZH040
BZH041