Re: Learning troff - where to start?

[Peter Schaffter]

On Wed, Oct 14, 2020, Damian McGuckin wrote:
> How many people use features of 'groff' that are not in 'troff'?

The mom macros rely heavily on extensions to groff that were
implemented during Werner's term.  Since many (most?) new groff
users these days gravitate towards mom, I'd say quite a lot of
people rely on those features.

I learned troff entirely from ctsr54.  It is not for nothing that
it remains the canonical starting point for exploring groff.

Prentice-Hall published _Troff Typesetting for UNIX Systems_
(Emerson, Paulsel) in 1987.  It's still available online.  It might
be the very thing the OP is looking for. 

-- 
Peter Schaffter
https://www.schaffter.ca