How can I add a signature field?

I want to add a signature or initial area to the specific field that is attached.

You can add E-signature in your form.

Please follow this link to know how to add e-signature in your form:

https://www.jotform.com/help/433-How-to-Add-an-E-Signature-to-Your-Form

Hope this will help.

If you have any further query, please let us know.