Issue of Reprint the R42565 Invoice in proof mode

Dear all expert,

Good day,

I having an issue to generate the invoive number when we base on the following setting. This is good for us the invoice date is not update to the Sales Order Details. But the invoice number should be there as we want to show the Invoice number when Declare Customs.  Kindly advise on whether on any setting will show invoice number when run in Proof Mode. Thanks in advance.

E1: 42: R42565: Print Invoices UBE FAQ [Video] (Doc ID 1264795.1)

Print/Proof/Reprint

Question 1: How can Invoice Print (R42565) be setup to print Invoice in proof mode? Will the date printed from printing invoice in proof mode be taken as the final invoice date?