You can add the menu from here. Click on the Create New Menu button to create a menu.
Now your menu is created and you need to add some items to it. To add items click on the Add Items button.
The menu item list will open up, just click on any item to add it to your created menu. After creating your menu and adding the menu items you can reorder the menu items by using the drag and drop features. You can rearrange the menu and submenu items too.
Don’t forget to click on the publish button to save the changes.