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Level 9

I have a form that is really two forms in one. Toip section and a bottom section. Each section has a send by e-mail button that sends the PDF form to the next department. I want the top half of the form to verify all required fields are completed when the send by email button in that upper section is clicked. Then I want the bottom section send by email button to verify only the bottom section before sending the form. Is there a way to break it up into two sections like this?