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Hi There,
When I view the Quantity On Hand page for a product, I'd like to replace the "owner" column with the Lot's Internal Reference Number. I'm in developer mode, but cannot seem to add stock.production.lot, "ref" to the view.
I'm using self-hosted Community Edition, version 11.
Also, whenever I'm in a product search, I'd like to be able to search by this reference number, but currently, it does not.
for your first point you need to take related field and then only you can add in tree view.
Edited :
Add new related field in stock.quant object. now you can add this x_ref to your view. 
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Pinakin,
Thanks for being the first to chime in. As I'm new to Odoo, can you explain a little more clearly what I need to do, specifically?
If you have access to the Odoo Studio app, it will be posiible to do it without coding.
@Matthew I have edited reply you can check . Just you need to create another related field on stock.quant object after adding the new field you can add in qty on hand xml view.