Panasonic 135FP Operating Instructions Manual page 56

Installation and Configuration (Windows 2000)
Layout Tab
Orientation
Select portrait (vertical) or landscape (horizontal).
Print on Both Sides (Duplex) [DP-150FX only]
Specify duplex printing for printing on both sides.
Select the binding side (None/Flip on Short Edge/Flip on Long Edge) for duplex printing.
Note: Duplex Printing on Invoice/A5 is not supported.
Advanced...
Specify detailed settings. Refer to Advanced
56
button
for details. (See page 58) 62