• 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 may embed videos from the following providers archive, bliptv, dailymotion, google, guba, imeem, lastfm, livevideo, metacafe, myspace, revver, sevenload, spike, tudou, twistage, ustream, ustreamlive, vimeo, voicethread, yahoomusic, youtube, zzz_custom_url. Just add the video URL to your textarea in the place where you would like the video to appear, i.e. http://www.youtube.com/watch?v=pw0jmvdh.
• You can enable syntax highlighting of source code with the following tags: <code>, <blockcode>, <c>, <cpp>, <drupal5>, <drupal6>, <java>, <javascript>, <php>, <python>, <ruby>. The supported tag styles are: <foo>, [foo].
• Textual smileys will be replaced with graphical ones.
• Twitter-style @usersnames are linked to their Twitter account pages.
• Twitter-style #hashtags are linked to search.twitter.com.

More information about formatting options

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