Oki C8800 - Manual (Page 78)

Colour matching (advanced) > 78
W INDOWS P OST S CRIPT
1. In the driver’s [Layout] tab, choose [Booklet] from the
[Pages Per Sheet] drop-down list.
2. Check that the duplex option is set to [Flip on Short
Edge].
NOTE:
If the Booklet choice is not shown, check that the Duplex
option is enabled in the driver. (
“Setting the driver device
options” on page 29 )