I've been able to print Postscript files to an HP LaserJet 5SiMX printer on my network using either the lp or lpr commands on my SunOS. The plots I've made have all been on 8 1/2" x 11" (A-size) paper. This printer has an upper and lower tray as well as a manual bypass tray on the side. The bypass tray is loaded with B-size paper. I'd like to plot B-size postscript files on this plotter usingthe B-size paper in the bypass tray. I believe that I need to embed the appropriate 'paper source select' command *in* the postscript command stream I send to the printer. I don't have the manual for the HP Laserjet so I need to know what command to embed to make the plot go to the bypass tray.