Required for Auto Selection to work--select the name of the field in the TaskScreen's MultiRow FieldMap to match with either the ScreenMatchField, SelectionParameterName or SelectionLiteral generated definitions (depending on the setting for RowMatchType).

 

Regardless of the setting of RowMatchType, the field selected here is used to select a match.

 

Note: it is easy to override the matching logic in the generated class to implement more complex matching, including matching against more than one field in the active row.  For each auto-select screen there are a number of virtual properties and methods related to auto-selection, making it easy to customize, regardless of the selections made in the Auto-Selection property group.