Use the events to include user FORM routines which modify the flow, or a user interface (event "ST"). Proceed as follows:
Choose
.Choose New Entries.
Press F4 for help on the field in the "Evt" column. The system displays the defined events.
Double-click on the desired line to select an event. The system copies it into the field.
Enter the FORM routine name in Form name/Program name or, for the event "ST", the user interface program name.
Save your entries.