Basically why I was poking around, printing a TXT file would use the default font but there was the capability of using PCL to switch fonts, and the printer came with some really nice ones built in.
Later we got a copy of PCTeX for DOS that completely changed everything.
I also wanted to change the font for txt files as well. I didn't have a computer at home and would print the txt version of Linux HOWTOs 2-up to save paper, but also wanted to save toner. I had very little CS training at that time, except for some rudimentary fortran. Learning Linux on my own was to become my CS university. I still have fond memories of poring over the ghostscript codebase.
Later we got a copy of PCTeX for DOS that completely changed everything.