How to Configure Components Inside a Popup
You can use Page Composer to configure the behavior of many components in the Purchasing application UI. To configure popups, you have to take an additional step. This guide demonstrates how to make the Supplier field required in the Add to Document Builder popup.
1. In the Structure pane in Page Composer, find the popup component and note that it does not currently show its child components. Edit the popup component and set the Content Delivery to Immediate.
2. After you hit OK, the child components will be visible in the Structure pane. Edit the Supplier component and set the Required property to True.