I have been researching using sequential numbers for invoices and purchase orders, but all of them seem to advance the number either every time the document is opened or saved. My purchase order is part of a larger file, and since I will be opening and saving the file without necessarily writing a purchase order I need more control over its advancement. I was wondering how I could create a button that when pressed or selected would advance the number by 1? Also, how could I make it create a unique number depending on who's creating the purchase order. For example, let's say the user is "John Smith" how could I have the P.O. number be somthing like "JS-0001"? Thank you very much in advance for your help.
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