Use the Sides option menu to specify how many sides
  of the paper your image will be printed. You can also
  specify the way a paper medium is turned as an image is
  printed from one side to the other.

  To specify a Sides option, click MB1 on the Sides list
  box. A pull-down menu is displayed. Choose one of the
  following:

  Option             Description

  Default            The default setting determined by
                     the printer queue characteristics.
  Simplex One Sided  Prints on one side of the sheet of
                     paper.
  Simplex Two Sided  Prints on two sides of the sheet of
                     paper but uses a page layout as if
                     formatted for single-side printing.

                     The layout reflects such things
                     as placement of margins and page
                     numbers.
  Duplex One Sided   Prints only on the first side of
                     each sheet but retains the page
                     layout intended for duplex printing.

                     The layout reflects such things
                     as placement of margins and page
                     numbers.
  Duplex Two Sided   Prints on two sides of a sheet; the
                     second side is reached by flipping
                     the page about its left edge, as in
                     the binding of a book.
  Tumble One Sided   Prints only on the first side of
                     each sheet but retains the page
                     layout intended for tumble printing.

                     The layout reflects such things
                     as placement of margins and page
                     numbers.

  Option             Description
  Tumble Two Sided   Prints on two sides; the second
                     side is reached by flipping the page
                     about its top edge, as in some legal
                     documents

  For a description of each option, double click on an
  item from the list of additional topics below.