Click on Add Link button to create new URL. You will see a modal popup coming out that you can fill in and create a URL. The structure of the super navigation makes it pretty easy to add new URLs and managing navigation tree.

Once you click on Create Link button, this modal will appear. You can select URL, Entry or Category link you want to add. Default URL is pre selected. All the custom fields will be appear at the bottom of the form. You will get default options like Link Text, Open in new tab and a parent assign radio box if you want to assign that link to any parent.

Once you add links, You will see those links immediately added in the TREE. You can reorder, Check the URLs are correct or not, Click on the URLs to go to that page to make sure all works good.