As most users of WordPress 2.x and 2.0.x are aware WordPress come with a very small list of the editor buttons enabled. In order to enable these other buttons you had to open a file (tiny_mce_gzip.php) and add the buttons manually. Now editing the php file is fine for most programmers or folks familiar with WordPress. For the average user this might be a hard task. Another problem with this option is you are in fact enabling the buttons for all users. If you happen to manage a site with a large list of authors you may want to only allow more advanced WYSIWYG buttons for the authors you trust.

Here is the link for solution WYSIWYG Button Manager for WordPress. The beta version of this plug-in can be downloaded here.