A way to use e-signature and/or smooth signature with PDF

It seems there's no way to include an e-signature with the PDF editor unless you have an account with the Adobe, Docusign, etc? Please confirm if there's anyway to incorporate a live signature with the PDF feature. How do you integrate smooth signature or e-signature with PDF?

E-signature field is transferred to the PDF forms but, you cannot add the smooth signature to the PDF form. You don't need to login to DocuSign or Adobe to use this.

You can also read this article: https://www.jotform.com/blog/how-to-add-a-signature-to-a-pdf/

Thank you Andrew. But it seems you also must go to the PDF Editor and add the "signature line" element to the PDF version. Correct?

Also, in the PDF is there a way to make the signature required?

Definitely yes. You must add "signature line" with PDF editor(As you already did). Because of some technical reasons, not all fields are passing to PDF form. 
Unfortunately, there is no way to make the signature field required.