Hello I am very new to the world of forums but i have a question about pastel

Where i work we have about 3 computers running pastel all making many invoices a day
We would like to know if there is a way to leave a code or name for a computer on an invoice so that we can know which pc/sales clerk made that specific invoice
We normally work really fast and typing down a code of our own wont work as we would probably not have the time or would just forget to do it, so if possible it must automatically appear on the invoice

In summery: Is there a feature in pastel that would allow me to identify which computer made a specific invoice from the print out.