Print Duplex
/pd
This option is used with form documents only
The Print Duplex option sets the duplex printing option for a given form document. It prints the document Double-Sided, Side-to-Side, as if that option were selected at the Printing Properties dialog box (which you can access by clicking Document Properties > Printing (File menu).) When the user prints the form document, it is printed using this option.
If using this option at the command line, include the Template File (/tf) option.