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

Sorting items allows reps or buyers to sort the items in the catalog in the way that is useful to them (the default sorting is defined per Filter in each Filter definition). 

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's sorting options in 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 -> Edit the Transaction Type you wish to configure sorting for (for ex: Sales Order, B2B Order, etc)

Open the Views tab 

Open the "Search" section of the configuration

Edit the "Item sort" and add the fields you wish the user to be able to sort by. Save and sync your device to see the sort icon appear in this Transaction Type