There is currently no customisation for sorting of matrices. Please copy existing Excel functionality to sort by row name or by value fields ascending or descending.
I'd like to be able to define how rows are sorted. From what I can tell it's AtoZ or ZtoA, but I need to be able to define the sort order. For example, if I'm using a matrix and have text row values, the logical order in which they should be displayed doesn't necessarily match alphabetic order.
