rxdbgrid header rowfixed not has this property

[eldonfsr]

DBgrid has rowfixed wich is for handle the headeer and rowcount start after rowfixed values is get
but on rxbdgrid don't has this property  i tried to access 

 rxDbGrid1.DefaultRowHeight:=10; 
 rxDbGrid1.Columns[0].Title.Caption:='Mayor';
 rxDbGrid1.Columns[1].Title.Caption:='Menor';

but row height 
 rxDbGrid1.DefaultRowHeight:=30; 

show all same height  of row ... rowfix we  need that property...