Stamp question

I have successfully created a couple of stamps using app.response. No problem. The two stamps I've created are fields in a table, seven rows and four columns, looks like a purchase order and it totals each row. OK that gives you a picture of what the stamp looks like. Now, my question is, I apply the stamp and the window opens asking to enter an item, then click OK. Then the next field asks to enter an amount and a price. Now, what I'd like to know is, is it possible to go back one or two fields. So, in essence changing one's mind and being able to enter a different item and/or amount and/or price before the stamp is set. I know once applied the info cannot be edited. One has to delete it and reapply a new stamp to make any changes. But, I'd like to just go back one or two windows prior to applying the stamp. If you know, let me know. I'm curious. Thanks.