Create a menu
Go to Appearance > Menus and create a new menu. The name of the menu is irrelevant. Add pages to the menu. Under Menu settings, set the menu to ‘Primary Navigation’. Save the menu.
Subpages
The navigation is designed for using subpages. The subpages will show in a dropdown menu. You can create submenus by placing a menu item under the parent and indent it to the right.
Mobile Menu Display
When viewing your site on devices with smaller widths, a “hamburger” icon button is automatically available to open the menu.
The menu items are revealed when clicking the “hamburger” menu button.