Sets or returns whether or not the subtotals for each group should be displayed at the top or the bottom.

 public bool DisplaySubtotalsAtTop{ get; set;}

Public Property DisplaySubtotalsAtTop() As bool

This can be set on any type of PivotTableField (DataField, ColumnLabel, RowLabel, PageField) but will only have an effect when on a RowLabel or ColumnLabel.
CalculatedFields cannot set or return this property.