Navigate to this option by going to your website admin, browse to Appearance > Customize > Menus > Select a Menu.
You may be using a Template for your website. In this case, you may already have a menu defined in your menus tab. Here’s how it will look if you already have a menu in place.
You can still add more menus, rinse and repeating the “Create New Menu” process. To edit the menu, you will just have to click on the Menu you want to edit. In this case, we will click on the “Main Menu” tab to browse over the current state of its settings.
From this window, you can add further items, delete it or change the menu location as you desire. You can even edit the menu options for automatically adding pages or deleting the menu altogether as we covered in other guides.
To edit any of the menu items simply select one and you will be given the option to edit all of its options.