In this tutorial we'll cover the image upload, and gallery upload meta box controls. They are pretty useful controls, especially if you want to create a plugin that requires them.
Sometimes you'd like to add things to your menu that you usually cannot find in the menus page. Something more than just links, or you'd like to have customized menu item that behaves differently when you're logged in or not. I'm going to show you two examples of using the 'wp_nav_menu_items' filter: one is adding custom My Account menu item for WooCommerce, and the other example will show you how to add a dropdown widget to your menu.