Other templates install many of the Searchable navigation template components. We've documented them in these knowledge base articles:
Model
The Searchable navigation template adds the Navigation model:

Pages
The template adds the Navigation items page:

To read about how to use navigation items, select ABOUT, which opens the About navigation page in a modal window:

To add a new navigation item, select ADD, which opens the Navigation page in a modal window:

When you select an existing item, the navigation page open in context, and you can edit the item's details:

Search settings
The template also adds the Navigation search setting:

You can select the search setting to open the configuration:

The search page shows the Navigation filter, and when you select the navigation item it opens the URL you entered in the Navigation page:
