# [texhax] \underarc

Uwe Lueck uwe.lueck at web.de
Thu Sep 10 05:18:39 CEST 2015

On Dienstag, 08. September 2015 um 12:16 Uhr, Rodolfo Medina wrote:
> I want to put a small arc under a letter or a group of letters, like a smile.
> I see that arcs' package can do what I want with the \underarc command; but
> don't know how to install and use it with plain TeX instead of LaTeX. Is it
> possibile, and how?

Maybe I did not deny this explicitly enough previously, while I wrote that
the arcs' package heavily uses LaTeX's font selection scheme. But I thought
that NFSS can be loaded with plain TeX. More about something like this:

http://www.tex.ac.uk/FAQ-fonts-pln.html

which is too much for me. Still, you could not directly use the arcs'
package, it has LaTeX commands like \newcommand and \symbol, and it
needs the relsize' package which has commands like \DeclareRobustCommand.
Well, maybe after

\def\newcommand#1[1]{\def#1}

and \DeclareRobustCommand likewise -- and \def\symbol#1{\char#1} ...
you can load arcs.sty. For me it is not obvious.

\bye,

Uwe.