etc/ps-prin3.ps

   1 % === BEGIN ps-print prologue 3
   2
   3 % --- duplex feature verification
   4 UseSetpagedevice {
   5   << /Duplex DuplexValue /Tumble TumbleValue >> setpagedevice
   6 }{
   7   statusdict begin
   8    DuplexValue setduplexmode TumbleValue settumble
   9   end
  10 }ifelse
  11
  12 % === END ps-print prologue 3