etc/ps-prin3.ps

   1 % === BEGIN ps-print prologue 3
   2 % version: 5.2.2
   3
   4 % --- duplex feature verification
   5 UseSetpagedevice
   6 {BMark/Duplex DuplexValue/Tumble TumbleValue EMark setpagedevice}
   7 {statusdict begin DuplexValue setduplexmode TumbleValue settumble end}ifelse
   8
   9 % === END ps-print prologue 3