Using HTML tags

You can use the HTML language to make comments more readable.

A plain text will be also properly displayed.

greek letters : <font color=#FF0000>&lambda;</font> gives λ
subscripts : <i>a</i><sub>x</sub> p<sup>n</sup>gives ax pn
to avoid interpreting the text as HTML use <xmp>a<sub>3</sub></xmp>

Please use the HTML-markup option with caution:
Create a test HTML file and check it. Then paste the contents of the <body>
to the Comments field.