• Web page addresses and e-mail addresses turn into links automatically.
• Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>
• Lines and paragraphs break automatically.
• You can enable syntax highlighting of source code with the following tags: <code>, <blockcode>, <java>, <javascript>, <php>, <rails>, <ruby>, <scheme>. Beside the tag style "<foo>" it is also possible to use "[foo]".

More information about formatting options