Replacing Order Number text in Sales Invoice to Invoice Number

I have a simple request to make!
Can someone please help me to get the default “Order Number” text that appears on my Sales Invoice changed to “Invoice Number”.

No. The order number refers to your sales order number (if you have one). The Reference field is your sales invoice number. When one transaction type is copied to another, that field is hard-coded to carry over the sales order number.

Further, if you are referring to changing text on the entry screen, that cannot be done.

Thank you for the quick response! I used the reference field as you suggested. Works well for me. Thanks again.