Thread:Project:Support desk/Mediawiki.org Editor feature - add on, extension? (how to?)

Hi all,

When we edit a page on Mediawiki.org the on-line editor has a tool bar with buttons to quickly insert wiki-text. (ex. ([]), etc.) The tool bar just bellow the (Save page) and (Show preview) buttons when you edit a post.

So how could I implement this on my Wiki? Is it an extension, a special add-on? How do you go about configuring the enduser's Editing tool?

I looked at the Special:version page but it is a little overwhellming...

Many thanks! Frank