The Line Item Detail - Department field displays the Department from the item's Inventory database record.
To edit the Department, press [Ins] from the Department field on the Line Item Detail screen and select the desired Department from the Departments Lookup List. Editing the Department on the Line Item Detail screen changes the Department for the current line item only. It does not change the Department field in the item's Inventory database record.
See:
Line Item Detail Screen Contents
Sales Manager Contents