The image shows the Function Description Maintenance screen. The mandatory fields are Function ID and Module List. The other fields such as User Function Id, Execution Category, Name, Type, Menu Head, Module Group ID, Type String etc are optional fields. The Main, Control String for functions and reports, and Duplicate Check Fields are the tabs available at the middle of the screen. The function description table shows the Language Code, Main Menu, Sub Menu 1, Sub Menu 2, Balloon Help, and Description. For more information, refer to the field description table.