Shopify's menu builder
In the Shopify Dashboard, go to Online store > Navigation. Here, you’ll find two pre-populated menus: Main menu and Footer menu. You can edit the links in these menus by clicking on the titles to edit them, or create additional menus by clicking the indigo Add menu button.
Below is an example of how the main menu is set up in our Atlantic-Chic demo:
Connect your menu to the header
Return to the theme editor, Customize > Header > Navigation, connect your menu to your header. By default, it will display the Main menu, but you can connect any menu you create from the Main menu dropdown. If you want to edit the links that appear in your chosen menu, use the Edit menu shortcut.
If you want to add dropdowns to your top-level navigation, check out our instructions here. If you're looking to add a mega-navigation menu (also known as a multi-column menu, mega-menu, etc.)
Creating a mega-navigation menu in Atlantic
Atlantic will automatically convert dropdown menus to mega-navs if each 2nd tier item has at least one 3rd tier item.