index.tex

\documentclass{article}
\title{Test for ink ascent/descent}
\author{Frédéric Wang}

\usepackage{xcolor}
\usepackage{amsmath}
\usepackage{unicode-math}
\setmathfont{ink-ascent-descent-test.otf}

\newcommand{\A}{\color{red}{\symup A}} 
\newcommand{\B}{\color{green}{\symup B}} 
\newcommand{\C}{\color{blue}{\symup C}} 

\begin{document}
\maketitle

\section{Test for ink ascent/descent}

\subsection{Text A, B, C and √}

\_\_baseline\_\_$\A$\_\_$\B$\_\_$\C$\_\_$√$\_\_baseline\_\_

\subsection{Fraction AAA/AAA}

$$\frac{\A\A\A}{\A\A\A}$$

\subsection{Fraction BBB/BBB}

$$\frac{\B\B\B}{\B\B\B}$$

\subsection{Fraction CCC/CCC}

$$\frac{\C\C\C}{\C\C\C}$$

\subsection{Fraction ABC/ABC}

$$\frac{\A\B\C}{\A\B\C}$$

\subsection{Square root of AAA}

$$\sqrt{\A\A\A}$$

\subsection{Square root of BBB}

$$\sqrt{\B\B\B}$$

\subsection{Square root of CCC}

$$\sqrt{\C\C\C}$$

\subsection{Fraction AAA/√CCC}

$$\frac{\A\A\A}{\displaystyle \sqrt{\C\C\C}}$$

\end{document}