If you are working with a Summary Report in 11.03 and want to 'invert' the grouping you have to recreate the summary entries. This tedious if you have made adjustments to the defaults on the rows (e.g. made 'specific' selections etc.) as these are lost when you recreate the rows in the right order.
Would be neater if you could simply re-order the rows making up the summary report. So (e.g.) drag one row from bottom of stack to middle. Or do by clicking on "up" and "down" ordering buttons or some such.