Changing Column Sort Order
You can change the sort order of a grid column directly on a transaction page. Sorts persist only as long as you are on a page. You can toggle between ascending and descending order by repeatedly clicking the column header. The last column header that you click becomes the primary sort for the grid. Grids enable you to have primary, secondary, and tertiary sorts. Original layout grids have no visual cue to indicate the sort order.
Note:
Sorting is disabled on columns consisting of radio button fields.
You can also change the sort order by using the Personalize link. This type of sort persists until you change it by using the Personalize link again.
See Personalizing Grids.