SharePoint uses breadcrumb navigation to let users keep track of where they are.
In Web-site terms, breadcrumbs are site paths created to mark your progress as you navigate through the site - and they also show how to navigate back to where you started from.
Breadcrumbs in SharePoint look like this by default:
Team Site > Project Site > Shared Documents
In this example, you’re sitting in the Shared Documents document library. You can backtrack to the Project Site or Team Site simply by clicking the link to follow the breadcrumb.
The headings displayed in the breadcrumb come from the site’s title. You can change the heading by changing the site’s title using the Site Settings page.
There are two types of breadcrumb in SharePoint (MOSS 2007
Breadcrumb that appears at the very top of the page. This breadcrumb allows you to navigate to higher levels of site collections and portals.
Breadcrumb that appears in the page’s content that shows where you are in the present site and site collection.
You can expand a site collection’s global navigation by connecting the site collection to a higher-level site collection or portal site. This is useful if you need to attach a divisional site to a company portal. You must be a site collection administrator to perform this task. To connect to a higher-level site, follow these steps:
Step-1: Browse to the site collection’s top-level site by clicking the farthest left link (usually named Home) in the global navigation breadcrumb.
Step-2: Choose Site Actions?Site Settings?Modify All Site Settings.
In a Web Part page, choose Site Actions?Site Settings.
The Site Settings page appears.
Step-3: Click the Portal Site Connection link in the Site Collection Administration section.
The Portal Site Connection page appears.
Step-4: Select the Connect to Portal Site radio button.
Step-5: Type or paste the URL for the portal or site collection in the Portal Web Address field.
For example, if the URL for the server you wish to connect to is http://rajnet, type that value.
Step-6:Type the name you want to appear in the global navigation bread-crumb in the Portal Name field.