Bold — Shows as Bold
Italics — Shows as Italics
Underline — Shows as Underline
Red text — Shows as Red text (Note: #FF0000 is the hexadecimal color code for red).
Blue text — Shows as Blue text
[en.scratch-wiki.info] — Shows as [en.scratch-wiki.info]
Scratch Wiki — Shows as Scratch Wiki
— Shows as
Quotes

Quote

This is an anonymous quote

Creates an anonymous quote, with no name:

This is an anonymous quote

Quote
A_Scratcher
I am being quoted

Creates a quote box that starts A_Scratcher wrote:

A_Scratcher wrote:

I'm being quoted!
Code

This is some code.

This is some code.
If it is long enough, it will have a scrollbar, like this:

This is a long piece of code. This is a long piece of code. This is a long piece of code. This is a lon

Not to be confused with Scratch Emojis.
Scratchers may want to add emoticons to their posts. Here is what can be created:

or =) — Forum Smiley - Smile.png
:| or =| — Forum Smiley - Straight Face.png
or =( — Forum Smiley - Sad.png
or =D — Forum Smiley - Grin.png
:O or — Forum Smiley - Yikes.png
— Forum Smiley - Wink.png
:/ — Forum Smiley - Hmm.png
— Forum Smiley - Tongue.png
:lol: — Forum Smiley - LOL.png
:mad: — Forum Smiley - Mad.png
:rolleyes: — Forum Smiley - Rolleyes.png
:cool: — Forum Smiley - Cool.png
Those emojis can be prevented by putting the emoticon within blocks; an example of how to do this is

Blocks
Scratchers can show Scratch scripts on the forums using the scratchblocks tag. Before the forum update on January 7, 2012,[2] Scratchers could still show scripts by using an old system of forum blocks with the [blocks] and [/blocks] tags. There were many problems caused by a lack of updates, such as 34 blocks missing and 5 that needed to be removed.

Advanced BBCode
Some BBCode can be used to make certain effects:

— Makes text invisible in normal posts (although it is slightly possible to see it)
— Makes text invisible in quotes (although it is slightly possible to see it)
or — Makes text completely invisible on normal posts
— Makes text completely invisible in quotes
— Makes all text completely invisible, no matter where it is, although it does not work on Internet Explorer 8 and below.
— Even bolder
Putting BBCode inside other BBCode tags makes the BBCode show up instead of the output; for example, "[i]" would show as ""
Putting brackets inside other brackets escapes the bracket; for example, "[[]i[]]" would show up as ""
— Linked image
Links do not need the http:// prefix, the forum adds it automatically (but images do need it)
Links beginning with ftp. get the ftp:// protocol added automatically
Links cannot contain the javascript:, about: or chrome: pseudo-protocols for the same reason.
— Colored link, but the underline stays blue
— Colored link, with colored underline
Suggestions
The following are some of the most popular suggestions for BBCode:

Text alignment
Fonts
Sizes — see below
Strike-through — see below
Highlight
It had also been suggested that the blocks only show up when the [blocks] tags are used.[3]

A Scratch Team Member has said the following about some BBCode suggestions:

“ Good ideas! I would certainly like to see some new functionality in BB code - I could really use that font setting code. ”
– Paddle2See, ar-post:622104

Added Features
In Scratch 2.0, several more BBCode tags that have been added:

[big] — Creates bigger text
— Creates smaller text
[list(=...)] — Creates a list
[*] — List item
— strikethrough text
— Center aligns text
[wiki] — Like [, but links to the specified title on the Scratch Wiki__[wikipedia] or [wp] — Like [http]