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How do I know what port my LaserWriter is connected to?

When you run the 'postscript' command in GCG, it asks 
To what port is your LASERWRITER connected?
If you have your networked Laserwriter registered on helix (see Can I print from helix to an AppleTalk printer? , then you can get GCG to print directly to your printer. If the PRINTER environment variable is not set, type 
 | lpr -Pprintername
in response to the question. This tells GCG to pipe the output to the Unix lpr command, and it should then go directly to your printer.

You can set the PRINTER environment variable by typing
helix% setenv PRINTER printername
(you can put this in your .cshrc file so you don't need to reset it for each session). If this is set, you can respond to the question with ' | lpr' only, since your helix session already knows what your default printer is.

You can also print to a file, if your printer is not networked or you want to use a different printer. In response to the question "To what port is your LASERWRITER connected?" type a filename. The graphics output will go to that file.