Field List 

Use

The field list shows you detailed information about the individual fields (such as structure and tables) of the form interface. It is displayed below the interface.

See Screen Display in the Context of the Form Builder

Activities

Double-click a field in the interface to display information on the properties and type of this field in the lower screen area of the interface. If the field has a type from the ABAP Dictionary, you can double-click the type name to go to its entry in the ABAP Dictionary.