Quick Launch

The Quick Launch is displayed on the side of most user-facing pages directly below the View All Site Content link.

You can use the Quick Launch to display section headings and links to different areas of your site in a logical manner. Neither the Quick Launch nor the View All Site Content link is displayed on site administration pages, such as the Site Settings page and the pages on which site administrators create and edit lists, libraries, workspaces, and Web pages. On a Microsoft Office SharePoint Server 2007 site, you can customize the Quick Launch by adding, removing, or reordering, links. You can also hide links to subsites and pages. You can even add links to pages outside the site.

Note To manage navigation for a SharePoint site, you must have the Full Control or Design permission level for the site. You have one of these permission levels if you can access the Sites Settings page for the site and you see the Navigation command under Look and Feel (on non-publishing sites, you will see the Quick Launch and Top link bar commands under Look and Feel instead of Navigation).

You can modify the display of Quick Launch by modifying attributes of the navigation control specified in the default.master file of the deployment (Local_Drive:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\GLOBAL). The default.master file is the Windows SharePoint Services master page that contains templates for site page layout, including the template for the left navigational area used in SharePoint pages.

The master page includes templates for two controls that by default are available for implementation on the Home page, a Microsoft.SharePoint.WebControls.Menu control, which displays the standard Quick Launch view used in the left navigational area, and a Microsoft.SharePoint.WebControls.SPTreeView control, which displays a site folder view. You can select which view to display on site pages through the user interface.

Ref: Customize navigation links on the Quick Launch

http://office.microsoft.com/en-us/sharepointserver/HA102551921033.aspx

How to: Customize the Display of Quick Launch
http://msdn.microsoft.com/en-us/library/ms466994.aspx