Configure Navigation Items On Site. Make sure everything you have on your website is reflected in the mobile version too. On the Navigation Settings page in the Global Navigation section select Managed Navigation.
You can also perform all of the following actions under Appearance Customize Menus and preview the changes in the Customizer. You can add any page on your site to your horizontal navigation bar as a menu topic or menu item. Fewer items in your navigation.
First things first.
Limit the number of menu items to seven. In some cases the navigation menu is simply tightened. Enable managed navigation for a site From Settings select Site settings. A navigation bar needs standard HTML as a base.