What the menu system offers
In WordPress 3.0, you’ll gain another admin screen under your Appearance menu called Menus. In the screenshot below, I’ve highlighted four key elements of the page.
Theme Locations: If your theme supports nav menus, it’ll register new locations for you to add your custom-created menus.
Individual Menus: This is where the names of your menus will appear after you’ve created them. (Note that the “+” sign will create a new menu.)
Add Menu Items: There’ll be several meta boxes containing pages, other post types, categories, other taxonomies, and custom links to your menus.
Menu Items: Once you’ve added menu items to your menu, they will appear under the menu for your configuration.