This functionality is new as of version 4.1.
While adding Reorder Items from a Picklist, to a 'New' Product Reorder, if a Product is not linked to a Vendor, it can be linked via the 'Add / Link Product to Vendor' dialog.
The 'Add / Link Product to Vendor' dialog is a reduced version of the 'Product Info' screen, and will capture the minimum amount of information needed to link an Existing Product and Vendor.
To Link a Reorder Item to a Vendor:
Navigate to the ‘Product Reorder’ screen for a ‘New’ Product Reorder List.
Click the ‘Picklist’ button.
The ‘Add Picklist’ dialog will open.
Add ‘Requested Quantities’ for Products from the Picklist.
Click the ‘Post’ button.
The Product will be added to the ‘Product Reorder’ screen.
Click the “< No Vendor Information - Click to resolve >” link.
The ‘Add / Link Product to Vendor’ dialog will open.
The ‘Product’ and ‘Product Pricing’ sections will be prepopulated by the Product Default values.
Complete the ‘Vendor’s Product Info' section.
Refer to Link Purchase Order Item to Vendor.