If you want to scan the product by UPC code then the first thing that will come in your mind to achieve it will be through coding in that field. But that will choke you to change the data type of the field too from “ITM” to “A”. Coding and changing the data type will tedious one. This can be achieved very easily with no hustle by setting up the standard parameter value.
New Stuff: How to get the sum of table column in Sage X3
Just go to the Set Up > Paramter values >VEN Sales 
Select the MIS (miscellaneous) details of parameters
Changes the AUTOSELITS (Automatic selection) to “YES” and save it.
This will reflect in all the fields of the sales module where the product fields are present. On entering the UPC code in the product field will automatically change into Product number corresponding to the UPC code.
Hope it helps
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