Epson AcuLaser C4000 Owner's Manual page 200

Copies
Designates the number of copies to be printed, from 1 through
999.
Duplex
Turns duplex printing on or off.
Binding
Specifies the binding direction of the printout.
Start Page
Specifies whether printing starts from the front or back of the
page.
Paper Type
Specifies the type of paper to be used for printing. The printer
adjusts the printing speed according to this setting. The printing
is reduced when Thick, ExtraThk, Trnsprnc or Coated is selected.
Page Side
Select Front when printing on the front of thick paper (Thick) or
extra-thick paper (ExtraThk).
Select Back when printing on the back of thick paper (Thick) or
extra-thick paper (ExtraThk).
Skip Blank Page
Enables you to skip blank pages when printing. This setting is
available when you print in the PCL5e, ESC/Page, ESC P2, FX, or
I239X mode.
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Functions of the Control Panel