You do not have a link list with a handle set to security, or you do and it's empty. Go ahead and create a link list called Security on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to security.
- Choosing a selection results in a full page refresh.
- Press the space key then arrow keys to make a selection.
- Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device