Konica Minolta bizhub C450 Shortcut Manual page 5

Basic (IV)
--Making Simplex (1-sided) / Duplex Copies
(2sided)
Press Simplex / Duplex to select
a. Single-sided original to Double-sided Copy 1  2
b. Double-sided Original to make Single-sided copy 2  1
c. Double-sided Original to make Double-Sided Copy 2  2
A. Combine Originals (I)
-- to reduce the size from 2/4/8 sheets originals into 1 sheet of copy
Press Combine Originals & then select 2in1，4in1