A configuration to an App UI can be as simple as just hiding certain fields in a dynamic form or table for certain audiences, to displaying brand new content through the use of a dynamic container.

When your page is open in the Page Designer, you can use the canvas to select customizable components. As you move your cursor over the page, the customizable components become outlined in blue, and a tag with the component's name appears at the top:

Description of the illustration extendableareas-businessrules.png

You can also use the Properties pane to select and configure the page. In the image above, the Properties pane contains links to edit the page using business rules. However, the Properties pane might look like the image below, where the Properties pane contains tabs listing the page's editable components and constants. When you hover over a component on the canvas, the component is also highlighted in the Properties pane's Components tab:

To configure an App UI, the extension containing the App UI you want to configure must be listed as a dependency in the App UIs pane. This means you should see your dependent extension listed by pillar. If you don't see the App UI you want listed by pillar, you can add it by clicking Dependencies:

This opens the Dependencies pane, where you can select the extension you want to add as a dependency. When adding a dependency, you add the extension containing the App UI you want to configure, not the App UI itself.

What Are Dependencies? explains more about how to work with dependencies in your extension.