Pivot tables configuration

Would be very time saving if when adding a Pivot table to a page. the right side wher it shows apreview, woul dbe limited to no more than 10 or 20 records. when working with tables that have thousand of records it just takes too long to display and you just sit there waiting. The same iin the builder. when you have thousand of records, makes it very hard to arrange the components what the pivot table streches thousand of rows down.