How to link all item on invoice to a vendor
How do I link an item in an invoice to a vendor
How do I link an item in an invoice to a vendor

The only way I am aware of to link an item to a vendor is to edit the item and populate the preferred vendor field. If you have multiple vendors per item and are looking to be able to report on which specific item was purchased from which vendor based on sale... I don't believe that can be done.
Thanks
Tracy