For each item in an order, wp2print displays a dropdown of the Vendors that have been configured in the system. To assign an order to a vendor, simply select the vendor from the dropdown.
The video below illustrates assigning an order item to a vendor:
Once the order item has been assigned to a vendor, the vendor's name is displayed in the order detail page. In the example below, the first item in the order has been assigned to an outside Vendor and to a specific employee at the Vendor. The second item in the order has been assigned to an internal employee but has not been assigned to an external vendor: