Configuration of User Default Values 
Use
If you have to create notifications, for which particular data is always the same, you can define certain user default values. The system then copies these values to the corresponding data screens. You can overwrite these values.
Features
You can define default values for the following data:
You can also use the screen type to set the reference object view here. For more information, see
Specifying a Reference Object.
The default values that are:
Activities
From the tab page for the notification, choose Extras
From the tab page for the notification, choose Extras