Highlight Languages:

List here languages that you want to highlight on your blog like this: php, html, css. Empty string means "all known languages". For the list of supported languages refer to highlight.js homepage.

Path to highlight.js:

Let's you place the script in a convenient place

Custom CSS:

<?php echo get_option('hljs_css'); ?>

Normally styling of code snippets goes into site's main CSS files. But you can write it here if you can't access site's CSS or just like it this way.