Field Name (fieldName)
The Field Name property specifies the name of the field from the data schema.
This property is set when you drag an item from the Data View to the report design document. You can change the name of the field by selecting a different field from the Field Name property. When you change the field name, other properties are automatically modified based on the field selected. For example, the Text or Value property is automatically set to the value of the new field. The end result is the same as if you had removed the original field from the document and dragged the new field from the Data View to the same location.
Type: String.
The value must be a field from the data schema.
The default value is the name of the field that was dragged from the Data View.
You can find the Field Name property in the Field Properties category of the Properties view.