How do I make only the signature field required on a fillable form when emailing?

I scanned an existing manual form and used the Prepare Form tool in Pro DC to add fields onto the form that my staff will prefill, it's meant to prompt us on what information is important to collect.  We then need to send the form to customer email for signature only.  When testing this, all of the fields I added with the Prepare Form tool are active from the email and prompt the customer through every field, I only want them to be prompted with the Signature field for signing and sending back.