`pdfman` converts UNIX manual pages to PDF documents using Ghostscript's
`ps2pdf`(1) or Apple's `pstopdf`(1) command (included in macOS up to version 13
-"Ventura") and displays them by calling `open`(1) on the resulting PDF file.
+"Ventura") and displays them by calling `xdg-open`(1) or `open`(1) on the
+resulting PDF file.
This enhances the useability of the manual pages quite a bit, because you now
can make use of your preferred PDF file viewer and all of its functionality.
The `pdfman` script makes use of the following tools, which need to be available
on the local system in the default search `$PATH`:
-- `open`(1)
+- `xdg-open`(1) _or_ `open`(1).
- Either `ps2pdf`(1) of the Ghostscript suite _or_ `pstopdf`(1) which was
included in Apple macOS up to version 13 "Ventura".