Dell 3130cn Color Laser Printer - Manual (Page 283)

If this option is not specified, multipurpose feeder Paper Type of the printer can be used.
-Mfo=mode
Specifies orientation for multipurpose feeder.
Available orientations for multipurpose feeder are as follows.
le
Landscape
ler
Landscape (Rotated)
se
Portrait
ser
Portrait (Rotated)
-Pon
Specifies alternate tray.
Available alternate trays are follows.
0
Use printer settings
1
Display message
2
Feed from multipurpose feeder
3
Use nearest size (Adjust to fit)
4
Use larger size (Adjust to fit)
5
Use nearest size (No zoom)
6
Use larger size (No zoom)
-St=mode
Specifies feed separators from.
Available feed separators from the following.
auto
AutoTray/Auto
1
1stTray/Tray 1 (Standard 250-sheet tray)
2
2ndTray/Tray 2 (Optional 550-sheet feeder)
off
Off
-Sp
Specifies printed separators.
Available only when the paper tray for separators is specified.
-Sb
Specifies Skip Blank Pages.