The deployment descriptor editor in WebLogic Server-targeted EJB projects is used in the same manner as with other EJB projects. There is one important difference that should be noted though -- changes to a bean or properties of a bean cannot be automatically rolled back. Changes are made immediately and reverting the editor state will cause errors.
For example, if you use the Beans page of the deployment descriptor editor to add a new bean, but then close the deployment descriptor editor without saving your changes, the deployment descriptor will be left in an inconsistent state.
Related tasks
Editing the WebLogic ejb-jar.xml file directly
Working with the WebLogic extensions page