Users can sort items themselves in the Order Center (Catalog)

Sorting items allows reps to present customers with the items in the catalog sorted in the way that makes sense to them. For example one customer may wish to see items sorted from highest to lowest price, while another from most to least frequently ordered.

You can define which fields will be available to the user to sort the items by. The user taps on the sort icon and selects a field to sort by - either ascending   or descending   (by tapping again on the arrow).

To configure User sorting of the catalog, add the fields you wish to make available to sort by in the Item Sort configuration. If you don't add any fields to this configuration the sort icon will not appear in the catalog.

Go to Settings -> Sales Activities -> Transaction Types -> Views and Forms