# Implementing Sub-Screens in Navigation Pages Using List Items

Lists can be used to implement sub-screens in Navigation Pages. There are two supported list items for Lists in Navigation pages: Form Item and Nav Item.

* **Form Item:** The Form Item creates a sub-screen which is a Form Page. This can be used to create a form to collect user input or to display data in a tabular format.
* **Nav Item:** The Nav Item creates a navigation Page and appends it to the navigation hierarchy. This can be used to create a new level of navigation or to create a link to another screen.

**To add a sub-screen to a Navigation page using a List, follow these steps:**

1. Create a **List** and select it.
2. Go to **Screen Controls** > **List Items**.
3. Select a **Nav Page** Item to link from the current Navigation page to a new **Navigation** page, or select a **Form Item** to link from the current Navigation page to a new **Form** page.
4. Configure the list item properties to specify the target screen.
5. Click the **Save button** to persist your changes.

**Here are some additional tips:**

* If you intend to add more than one navigational link to your static list, consider configuring the Layout Type property of your list.
* After successfully creating a Navigation link, your next step is to configure the screen properties of the destination page based on its type.

After successfully creating a Navigation link, your next step is to configure the screen properties of the destination page based of its type, view [Navigation Page](https://comunity.gitbook.io/learning.comunityplatform/v4/toolkit-guides/screens/building-screens/navigation) and [Form Page ](https://comunity.gitbook.io/learning.comunityplatform/v4/toolkit-guides/screens/building-screens/form)to learn more.