Since you can define and then embed several Web Dynpro components for a single Web Dynpro application, you must reference the components that the root component will use at runtime. For this purpose, you define a component usage.
The component referencing starts from the root Web Dynpro component.
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1. In the Web Dynpro Explorer, place the cursor on the subnode Used Web Dynpro Components of the root component and choose the context menu entry Add used component.
2. Enter a name for the component usage and specify its properties. Choose Browse to select the required component. There are two options for specifying the life cycle of the component, manual or createOnDemand.
3. Close the wizard by choosing Finish.
The component usages are displayed in the Web Dynpro Explorer.