Display a postscript file on screen. I can also use the older-looking ghostview or gv for the same end effect.
ps2pdf my_file.ps my_file.pdf
Make a pdf (Adobe portable document format) file from a postscript file.
gimp
(in X terminal) A humble looking but very powerful image processor. Takes some learning to use, but it is great for artists, there is almost nothing you can't do with gimp. Use your mouse right button to get local menus, and learn how to use layers. Save your file in the native gimp file format *.xcf (to preserve layers) and only then flatten it and save as png (or whatever). There is a large user manual /usr/
gphoto
(in X terminal) Powerful photo editor.
pnmtopng my_file.pnm > my_file.png
Convert the propriatory giff graphics into a raw, portable pnm file. Then convert the pnm into a png file, which is a newer and better standard for Internet pictures (better technically plus there is no danger of being sued by the owner of giff patents).
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