Is there a way to use Latex in the equation editor to create an arc over more than two letters?
\overset \frown {ABC} makes a (too) small arc. Pages doesn't recognize the latex command \overarc {ABC} or \overset {\large \frown} {ABC}.
MacBook Pro 15″, macOS 11.1
Anything that you enter into the Pages equation editor, be that LaTeX or MathML syntax passes through a blahtex converter that filters out anything that it does not support (and that is a great deal). Thus, all of those useful LaTeX packages that could help you implement a wide frown are excluded, and the best that I can whip up with the inherent converter limitations is this:
\scriptscriptstyle{\overset{\frown}{\mathsf{ABC}}}
which produces this:
Anything that you enter into the Pages equation editor, be that LaTeX or MathML syntax passes through a blahtex converter that filters out anything that it does not support (and that is a great deal). Thus, all of those useful LaTeX packages that could help you implement a wide frown are excluded, and the best that I can whip up with the inherent converter limitations is this:
\scriptscriptstyle{\overset{\frown}{\mathsf{ABC}}}
which produces this:
And if you had access to MacTeX distribution, the following will compile in TeXShop and produce the following in a PDF:
% compile with XeLaTeX -> frown.pdf
\documentclass[letter,16pt]{extbook}
\usepackage{graphicx,amsmath}
\newcommand\bigfrown[2][\textstyle]{\ensuremath{%
\array[b]{c}\text{\scalebox{2}{$#1\frown$}}\\[-1.4ex]#1#2\endarray}}
\begin{document}
foo \bigfrown{ABC} bar
\end{document}
Arc symbol over three letters