1. Use the gnuplot command set terminal to select a printer and set output to redirect output to a file.
2. Select the Print... command from the gnuplot graph window. An extra command screendump does this from the text window.
3. If set output "PRN" is used, output will go to a temporary file. When you exit from gnuplot or when you change the output with another set output command, a dialog box will appear for you to select a printer port. If you choose OK, the output will be printed on the selected port, passing unmodified through the print manager. It is possible to accidentally (or deliberately) send printer output meant for one printer to an incompatible printer.