Hey there,
If I understand correctly, your flow is:
You add an invoice line and you want to set the invoice name with the name of that product ?
If yes, that's something that you could achieve with a javascript or a plugin.
As the invoice already exists, what you could do is add a yes/no field at the invoice form. Then, write a JS that will check if you already have added some products to the invoice, if yes, do a retrieve of those guys and get the name for the first product and then set the name of the invoice record with that name.
Once you have the yes/no field in the form, you can register the JS to run on the onChange of this guy.
Regards,
Please let me know if you have any more questions.
if this answers your question, please mark it as answered.
