Create Drop-Down Menus
Drop-down menus, sometimes called nested menus, are navigation menus with parent and child menu items. When you run your cursor over a parent item, all the child items will appear beneath it in a sub-menu.
To create a sub menu, drag an item below the parent item, and then drag it slightly to the right. We’ve done that with 3 sub-items beneath ‘Services’ in our menu:

Here’s the sub-menu live on the site:

You can even add multiple layers of dropdown, so that your sub menu can have a sub menu. This can end up looking at bit cluttered, and many themes do not support multi-layer drop-down menus.
In this example, you can see that ‘Logo Design’ (a child item of ‘Services’) has two child items of its own.
