You can move attributes, methods and events of a class to their direct superclass.
Note that a conflict occurs if non-private components that you want to move to the superclass already exist in another class that is derived from this superclass. This results in a syntax error in the corresponding derived class.
Open the class.
Make sure you are in Change mode.
Choose Utilities → Refactoring →Refactoring Assistant.
The Assistant is started in a separate window.
Select the component to be moved and move it to the name of the superclass using Drag & Drop.
You can move several components at one time with multiple selection.
Choose Save.
The moved components are deleted in their original class and created in the superclass.