This theme supports 2 locations for a custom WordPress menu, which is:
1. Primary Menu
This is main navigation thats located in the header.
2. Mobile Menu
This is for mobile navigation when site browsed with mobile devices (mobile version).
For menu setup, navigate to the Appearance » Menus page. Enter a name for your menu and add links to the menu by using the options given on the left sidebar. You can manage your menus using the drag and drop functionality.
After setting up your menu, select the menu you just created from each of the theme locations (Primary Menu & Mobile Menu) drop-down box and click the “Save” button.