The Line Item Detail - NonSale Item field displays the NonSale Item check box.
The NonSale Item parameter on the Line Item Detail screen is used to manually
define a line item to be NonSale even if it is not in a NonSale Department (or to clear the NonSale Item parameter for an item that is from a NonSale Department). Note: This parameter is hidden if there are no NonSale departments. To enable the parameter, create at least one NonSale Department (it can be marked as hidden and no items are required to be attached to it).
See:
Line Item Detail Screen Contents
Sales Manager Contents