By splitting implemented interfaces you can move selected methods, attributes and events to a new interface. For more information, see Class Diagram.
The original and new interfaces are implemented by the same class.
...
1. Create a new interface as described in Creating Interfaces.
2. Select the interface from which you want to move the components.
3. Define the interface you have created as the component interface. Proceed as described in Nesting Interfaces.
4. Move the appropriate components from the original interface to the component interface. Proceed as described in Moving Interface Components to a Component Interface.
5. Remove the interface nesting which was defined only for the move operation.
The selected components are moved from the original interface to the new interface.