• 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><img><h1><h2><h3><h4>
• Lines and paragraphs break automatically.
• Twitter-style @usersnames are linked to their Twitter account pages.

More information about formatting options