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From: bed_gdg@SHSU.BITNET ("George D. Greenwade")
Newsgroups: comp.text.tex
Subject: cmex10 font, LaTeX line fonts scaling problem
Message-ID: <00945185.f47fe620.24967@SHSU.BITNET>
Date: 4 Mar 91 14:47:12 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: INFO-TeX@SHSU.BITNET
Lines: 47

Michael Barr <barr@triples.Math.McGill.CA> commented while I was away that
he attempted to make a post to INFO-TeX which somehow got misdirected.  He
has posted this to TeXhax already, but I thought it would be worthwhile to
pass along to our readership.  Apologies to all for any misdirected mail.
Should this ever occur with a post you have made, please bring it to my
attention so I can attempt to trace back what problem occurred in
transmission.
 
George
--------- forwarded from "Michael Barr" <barr@triples.Math.McGill.CA> ---------
font scaling in LaTeX
 
I don't recall this point being made previously about the LaTeX fonts at
other than 10pt.  I usually use 12pt (failing eyesight, I guess) and
have lately been using 20pt to prepare some slides, lacking the slitex
fonts.  I was quite surprised to discover that two fonts, at least, were
not scaled in the latex macro \xxpt.  I was astonished to discover that
the same two fonts were not scalded at 12pt and, once you know that, the
effect becomes obvious.  They are the cmex10 and the line10 (actually, I
should include the linew10 and the two circle fonts but I never use
them).  The failure to scale the cmex10 means that the large operators
are only a bit larger than the normal sized one and the failure to scale
the line fonts means that arrows drawn with them have the arrowheads
rather emacitated looking and badly placed besides (not at the ends of
the arrows).  The remedy for cmex10 is to add
 
\font\twlex=cmex10 scaled\magstep1
\def\@xiipt{\textfont\thr@@\twlex \scriptfont\thr@@\tenex
\scriptscriptfont\thr@@\tenex}
 
to the art12.sty (and the other 12.sty files).  For the line10, I have
added
 
\font \@linefnt=line10 scaled \magstep1
 
but this disables the \thicklines macro.  A somewhat more subtle
approach is needed to avoid that.
 
An art20.sty file I have made up includes the lines:
 
\font\twtyex=cmex10 scaled\magstep4
\font\frtnex=cmex10 scaled\magstep2
\def\@xxpt{\textfont\thr@@\twtyex \scriptfont\thr@@\frtnex
\scriptscriptfont\thr@@\tenex}
\font \@linefnt=line10 scaled \magstep4
 
Michael Barr