When run without any arguments, wkhtmltopdf dumps over a page of usage information to STDERR.
This is hard to read in a regular sized terminal, and to pipe to less one must redirect STDERR, thus:
wkhtmltopdf 2>&1 | less
It turns out that a manpage is offered:
$ wkhtmltopdf -H 2>&1 | grep manpage
--manpage Output program man page
When choosing this option, the output is appropriately formatted. Thus `wkhtmltopdf --manpage | less` is ugly. This displays fine:
$ wkhtmltopdf --manpage > foo
$ man ./foo
This is a feature request to build the manpage at installation time, add it to the appropriate /usr/share/man and have it handles by makewhatis
Man pages now get installed in 0.12.1.2.