Message-Id: <9311221541.AA19060@sc.ZIB-Berlin.DE>
Reply-To: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
Date:         Mon, 22 Nov 93 16:40:37 +0100
From: Frank Mittelbach <MITTELBACH@MZDMZA.ZDV.UNI-MAINZ.DE>
Sender: Mailing list for the LaTeX3 project <LATEX-L@vm.urz.Uni-Heidelberg.de>
To: Multiple Recipients of <LATEX-L@vm.urz.Uni-Heidelberg.de>
Subject:      Re: NFSS2: how do I change math letters in the middle ?
Status: R


Subj:	NFSS2: how do I change math letters in the middle ?

> when i asked Frank something like this last March or so, his reply was
> along the lines of `i didnt write NFSS so that you could write manuals
> about it'...

this sounds strange if pulled out of the context. It was said by me to
Sebastian when he asked for it to pull some tricks in a manual (about
graphics not nfss, i think)

There is a good reason for not allowing local changes to symbol fonts
but i don't want to go into that now.

> my pragmatic solution would be to typeset the examples in a separate
> file and input them as EPS files.

sebastians solution is a possibility if you have ps facilitities.

If you don't, you can do the following:

\DeclareMathVersion{showoff}  % this is automatically like normal
                              % if you don't change anything

\SetSymbolFont{letters}{showoff}{OML}{cmtt}{m}{it}

                              % this modifies letters in version showoff

then you can use this with

{\mathversion{showoff}
 $ ... $
}

in the middle of my document.

However, I have no idea what kind of MF trickery you did to produce a
math italic tt font. Maybe you are missing something at this point?

To explain what i mean:

letters should be an OML encoded font like cmmi10. it must contain
enough fontdimen etc to be usable in math. the only font beside the
cmmi set of fonts that is normally available is ccmi (concrete roman
math italic).  You can of course produce an OML cmtt font but this
means some Metafont runs.

It also means that you need an additional fontshape declaration, eg

\DeclareFontShape{OML}{cmtt}{m}{it}{
  <10> cmttm10    % <- whatever you call that font
  ...}{}

without this, the above declaration will be unable to carry out your
request and thus the substitution will start and that will bring you
back to  OML/cmm/m/it in the end.

hope that helps a bit

frank