PRINTPREFS — Display or change printing defaults.

Syntax:
PRINTPREFS /C:n /D:n /O:n /P:n printername

/C:nset the default color mode
   1: black and white, 2: color
/D:nset the default duplex mode
   1: single-sided, 2: flip on long edge, 3: flip on short edge
/O:nset the default orientation
   1: portrait, 2: landscape
/P:nset the default paper size
   1: letter, 5: legal
printernamedefaults to the user’s default printer