Syntax Highlighting is a much needed addon for anyone who is looking write articles or tutorials which has any custom code involved. You must be surprised to know that, none of the Joomla basic or advanced editors come with a proper syntax highlighting plugin. Not even the famous, JCE Editor.
Thankfully Joomla has one hidden plugin called Geshi, which does this job pretty well. I'm sure, many of you have never heard about Geshi or used it in real time. So, here is how to use it.