Using -Tpdf rather than -Tps and then ps2pdf

[Damian McGuckin]

I have used ditroff and then groff to produce Postscript for ages, from 
which I then use 'ps2pdf' or some equivalent to produce a PDF document. We 
even wrote (for clients) custom Postscript programs whose output we 
imported into troff.  I often send sai Postscript to printers.  I only
create PDF to read things on a screen or to send others output.

That is obviously not the 'recommended' way with 'groff'. I am curious as 
to what the case is for heirloom troff and neatroff.

Anyway, I am trying to rewrite the EQN User Guide and have got to the last 
chapter which is a short guide to using eqn within a pipeline sequence (or 
not) for troff users, or neatroff users, or groff users. I want to cover 
output to both Postscript printers and PDF documents.

But, the output direct to PDF from 'groff' does not match that of
going to Postscript and then converting that to PDF using 'ps2pdf'.

It seems to be doing naughty things with the page length. I am
using

        -ma4

to force an A4 page.

Any pointers. I attach the page which finishes nicely at the end of the 
sentence and the page using 'gropdf' which does not. How can I debug this?

Thanks - Damian

P.S. Trying to format my new EQN Users Guide document for both 'letter' 
sized paper and A4 is proving challenging at the very least.  When is the 
US going metric like the rest of the world?

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p8pdf.pdf
Description: Adobe PDF document

p8ps.pdf
Description: Adobe PDF document