By default, the DefaultFormatAppearances property is empty. The DefaultFormatAppearances property is not applied when the control displays initially the data. The DefaultFormatAppearances is applied only when the column is dragged from the control's columns panel ( PivotColumnsFloatBarVisible property ). The PivotColumnsFloatBarVisible property retrieves or sets a value that indicates whether the pivot columns float bar is visible or hidden. The DefaultFormatContent property specifies the default format (key of FormatContent object) to be applied on the column when it is displayed in the pivot-table. The DefaultFormatAppearances property can include any Key on the FormatAppearances collection. For instance, "bold,italic" specifies that the column will be displayed in bold and italic. The PivotColumns property specifies the list of columns that shows the summarized data.