Links:

[url]http://www.google.com[/url] Becomes http://www.google.com

[url=http://www.google.com]Google[/url] Becomes Google

Multimedia:

[img]images/banner.gif[/img] Displays the image on the screen.

[img=left]images/banner.gif[/img] Displays the image left-aligned.

[img=right]images/banner.gif[/img] Displays the image right-aligned.

[img=center]images/banner.gif[/img] Displays the image centered.

[flash]flashmovie.swf[/flash] Displays a flash movie.

[YouTube]YOUTUBE_URL[/YouTube] Displays a YouTube movie.

Text Formatting:

[b]TEXT[/b] Becomes Text.

[i]TEXT[/i] Becomes TEXT.

[u]TEXT[/u] Becomes TEXT.

[s]TEXT[/s] Becomes TEXT.

[highlight]TEXT[/highlight] Becomes TEXT.

[highlight=COLOR_NAME]TEXT[/highlight] Outputs highlighted text with the given color.

[font=FONT_NAME]TEXT[/font] Changes the font face to the entered font name.

[color=COLOR_NAME]TEXT[/color] Changes the font color to the entered value.

[size=#]TEXT[/size] Changes the font size to the entered number.

[left]TEXT[/left] Aligns text left.

[right]TEXT[/right] Aligns text right.

[center]TEXT[/center] Centers the text.

X[sup]2[/sup] Becomes X².

O[sub]2[/sub] Becomes O₂.

Other:

[quote]TEXT[/quote] Creates a quote box.

[code]TEXT[/code] Formats text for posting code.

[pre]TEXT[/pre] Outputs content as pre-formatted text.

[hr] Outputs a horizontal bar.