Hello! I have 2 questions on almost the same topic:
1.
I would like to add a custom field for “track and trace” number so that when I change the order status to “Completed” I want this to be sent to the customer email.
Is there any css i can write to do this?
2. How can I add a field on the Woocommerce>Orders> Order Details page so that I can add an attachement ?(i need this in order to send already created invoices ).
thank you in advance for your valuable help!
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