These slides were made with present (from -mm groff inputs): These slides are for presentations, with revelation. https://www.bobm.net.au/teaching/SimSS/OH/lect03-3.pdf
These slides have the same material, but without revelation -- for printing instead. https://www.bobm.net.au/teaching/SimSS/OH/lect03pr-3.pdf Although they are PDFs, they were first produced in PostScript, which was then converted to PDF. Hope that helps, Robert Marks -- h <http://www.agsm.edu.au/bobm>ttps://www.bobm.net.au (new) 0407665644