Hello again, YWWP.

 
Thank you for bringing this up in the Community.I will send your feature request to our product developers. They will be the one who tests the customer’s requests if they will consider it to the next update.
 
You may refer to the articles in customizing the invoice provided by my colleague ShiellaGraceA.
 
Do you have questions in your mind? Let me know right away so that I can assist you. Take care.