The Navigation Menu widget lets you add navigation wherever you need it. You can place the widget on a page and then select a menu and style for the menu you are displaying. This widget provides a template List Menu which can display multiple layers of the menus in a vertical list.
- Hover over the Navigation Menu and click on the ... icon
- Select Configuration
- Under the Display Template heading, select List Menu from the drop down menu
- Under the Included Pages heading, select All from the drop down menu
- Click Save
Please note that only List Menu was designed for multiple child pages to be shown. Please feel free to create a custom display template if you would like to implement new designs.