Additional user codes
[twitter] url to public tweet [/twitter]
Will retrieve, parse and display that tweet in your post

[spoiler] Text to hide [/spoiler]
The text to hide will be hidden away inside a drop-down box - readers have to click the box to view your text. Useful for "spoilers" or for long lists


[offtopic] Offtopic text [/offtopic]
Makes offtopic text less visible than the normal text. Used for irrelevant comments in thread.