Apple LaserWriter 12/640 PS - Manual (Page 100)

100 Chapter 5
Many of the installation procedures describe working with the printer’s left
and right sides and front and rear, as shown in the following illustration.
Installing the duplex printing unit
With the optional duplex printing unit, you can print on both sides of the
paper (often called
duplex printing or two-sided printing). You can only
duplex print from the paper cassettes. You cannot duplex print from the
multipurpose tray.
Note: The duplex printing unit requires a minimum of 12 MB memory in the
printer. For instructions on adding printer RAM, see “Increasing the Printer
RAM,” later in this chapter.
If you want to You need this much printer memory
Turn on PhotoGrade or use the 12 MB
duplex printing option
Turn on PhotoGrade and duplex 20 MB
print on all size paper (except legal)
Turn on PhotoGrade and duplex 24 MB
print on all size paper (including legal)
Front side Right side
Rear side (ports) Left side (has removable cover)