Hi Gregoire, > It doesn't matter, using dvips, I could turn the dvi-file into .ps.
groff's default output is PostScript.
$ groff <<<hello | grep hello
/F0 10/Times-Roman@0 SF(hello)72 12 Q 0 Cg EP
$
So you don't need to use DVI as an intermediate format. Or perhaps
you're trying to do something more complex that requires it?
Cheers, Ralph.
