Setting up an alternative or reference product cross-reference record
- Select Product > Setup > Extended Product Cross Reference.
 - Click New.
 - Specify the Type of reference you want to create.
 - Specify the Product and the Reference Product.
 - Complete the remaining fields.
 - Click Save.
 - 
            If the Confirm Creating window is displayed, select the
               cross-reference records to create for the reference product based on the existing
               cross-references for the product. 
            
If you create an opposite record for substitute, and a value is specified in the Sell Substitute First field on the original record, the value for this setting on the opposite record is blank.