Methods
of the Local Controller Interface
All
methods that can be changed - that is, methods that can be implemented by the
application developer - are listed on the Methods tab of each
controller. When double-clicking the method name, you switch to an ABAP Editor
which enables you to implement the source code.
In addition to the changeable methods, the local interface of each controller provides several methods which can be used but whose implementations cannot be edited by the application developer. It depends on the type and the implementation state of a controller when these methods are available in the interface.
Since
all methods of this group cannot be changed, they are not displayed on the
Methods tab of the corresponding controller. As a part of the complete
interface, you can display the existing methods using the following
icon:
Display Controller
Interface 
If you click this icon, the interface of the controller you are currently working on is displayed in a separate window. You can also display the interface of any used controller. Note that for each view controller, the usage of the corresponding component controller is created automatically, since this usage is generally always appropriate.
(Of course, you can also display the existing methods of the local controller by double-clicking the reference type IF_.................. of the attribute WD_THIS on the Attributes tab.)