Click Computer to see your disks and servers. Click Applications to see your Mac OS X applications. Click iDisk to open your iDisk.
Click Home to see the Documents, Public, Sites and other folders in your home. Click Favorites to see your favorite items.
Click the Back button to see the previous folder again.
Choose Customize Toolbar from the View menu to add icons to the toolbar. You can also drag icons for disks, servers, folders, and other items to the toolbar in a Finder window.