WordPress comes with a wonderful and user-friendly menus functionality. It allow you to create a custom menu with speed and place it in your theme’s supported menu areas or even in a widgetized area with the menus widget. You can customize your menu in all our themes by going to Appearance → Menus.
Read the Menu functionality on the WordPress codex.
Here’s a general overview of a menu we’ve created for our theme. We’re working on our main (primary menu), if you haven’t created a menu yet you will be prompted to create one before being able to add pages, etc… to your site’s navigation. You can create as many menus as you’d like as well.
In the left hand column is a list of all your pages, as well as custom post types, categories, tags, etc… You can then select certain pages, or products, or categories and add them to the menu you are creating.
Creating Drop Down Menus
Once you add an item to a menu, you can arrange those menu items. Placing the mouse cursor over the menu item title, when the mouse cursor changes to 4-arrows, hold the left-mouse button down, drag the module to where you want to place it. Then release the mouse button (this is called drag-and-drop).
To create a drop down item drag a menu item slightly to the right of the menu item above it to create a hierarchy (parent/child) relationship in the menu.
WordPress 3.6 adds a note when a menu item has become a sub link as well.
Adding A Home Link
Adding a “Home” link to your menu is useful if you want to give users quick access back to your front page, or if you have set a static page as your front page, and want a “Home” item in your menu. The logos in our themes are also links to your home page, but this helps some users with a specific link saying home.
To add a “Home” link, click View All under the Pages panel.
It’s up to the theme developer to decide how many menu locations a theme should have. Again, in our example we have several menu locations. Your theme may not have the same location names or number of locations. Regardless, there are two easy ways to assign a menu you just created to a menu location.
While creating or editing your menu, you can assign it’s location at the bottom of the menu. There is also a Manage Locations tab where you can assign all locations a menu from one screen. Helpful if your theme has many menu locations.