Values of dimension fields are always arranged in ascending or descending order. The sort order is indicated by an Up or Down arrow displayed within a corresponding dimension field's header:

To toggle the sort order for a dimension field, click this field's header:

You can also sort the values of a particular dimension field by the summary values calculated against a specific data field. To do this, right-click a column or row header, and choose the dimension field whose values should be sorted by the column/row summary values. A specific indicator marks the column/row whose summary values are used to define the sort order.

You can sort values of multiple dimension fields against a single column/row. To cancel the sorting, click the same item again, or 'Remove All Sorting' to cancel sorting for all dimension fields.