A syntax highlighting editor is capable of displaying text with coloured portions.
For example, an HTML-aware editor liked nedit will display <A HREF> type tags in red for the tag, blue for the tag content and green for the referenced material. Having your text colorized when editing can help separate code from chaos. This is particularly handy for seeing comments in italisized text instead of just plain text.
TakeDown.NET -> “Syntax-Highlighting”