For a simpler approach to a secondary nav, either for yourself or to handoff to a client, you can use the Simple mode. Simple mode allows you to create a secondary nav using a dropdown folder in the Squarespace editor. Simply create a new folder in your “Main Nav” area of your website and give it a url of /secondary-nav.

Next, add the data-nav-setup="simple" to your installation code in your Code Injection area.

With this setup, any links in your dropdown folder will get added to your secondary nav. This mode gives you less options, since you can only add single links, but the maintenance is much more straight forward.