You can customize on what all section links to show up in the Navbar. On clicking each section that you add to your landing page you can see SHOW IN NAVBAR/ HIDE IN NAVBAR option set to that section in left panel as shown in the picture below.
Show in Navbar:
Click on the button Show in Navbar to display hat particular section link on the top NAVBAR of your website.
Hide in Navbar:
Click on the button Hide in Navbar to remove that particular section link on the top NAVBAR of your website.
Click on Save to save the changes. You can also preview these changes before you publish them.