[Groff] More from Unix Text Processing

[Werner LEMBERG]

`Unix Text Processing' says that only \l's and \L's line thickness is
affected by changing the size with \s, whereas \D'...' commands
aren't.  In groff, both works; moreover, groff_out(5) says in the
description of `Dt' that `traditionally Unix troff drivers use a line
thickness proportional to the current point size'.

Can someone check this, please?  I can imagine that Unix troff's
output to PS printers has been enhanced since the appearance of the
book (in 1987).


    Werner