The default top navigation menu shows the mavigation structure in two levels, the first level are tabs and the second level is a dropdown menu.
It is possible to change the maximum depth of these menus. To change this default setting, do the following:
The setting can be changed by changing MaximumDynamicDisplayLevels iten in the SharePoint:AspMenu tag of the master page.
- Open the default.master page at [drive]:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\GLOBAL
- Search for "TopNavigationMenu" in the file.
- Change the property MaximumDynamicDisplayLevels to the value which you like.
- Save the file and you're done.