Customers explore your storefront through links and this is especially true for the header navigation.
Adjust or add a new menu
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.
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.
Create a mega navigation menu
Atlantic will automatically convert dropdown menus to mega navigation menus if each 2nd tier item has at least one 3rd tier item.