Konica Minolta bizhub 25e - Manual (Page 79)

3-12 Various printing methods
Printing on both sides of the paper
You can print on both sides of the paper.
NOTE
You cannot use custom size paper for duplex printing.
1
Open the printer settings screen on the computer (page 3-4) .
2
Click “Two-Sided”.
3
Select “Layout”.
4
Select the binding position from the “Two-Sided” pull-down menu.
5
Click [Print].