8.3.0 version of MathGraph32 brings up this new feature :
You can create a surface delimited by an angle arc and it’s chord. This surface is a native object and can be used for an object locus.
Download on : this page
Use mathgraph32 online on : this page.
Example :
Since version 8.2 you can also use the \columncolor, \rowcolor et \cellcolor in a LaTeX display
Example of LaTeX code
\begin{array}{|c|c|}
\hline \columncolor{lightgreen}\rowcolor{lightgray} 1 & 2 \\
\hline
3 & \cellcolor{yellow} 4 \\
\hline
\end{array}
and what you get in a MathGraph32 figure :