How can I insert a signature line in a form?

I'm wanting to have an applicant provide a signature on the form I am creating. I've sign a signature box on other Jot-Forms, but I don't see how I can add it to my form.

Hello YWAMWMI,

I did check your last edited form and found that you have already added the signature field in form successfully. Please check the screenshot below:

I will still go ahead and explain you how to add the signature field in form. We do have few signature widget which you can add in your form:  http://widgets.jotform.com/search/signature 

Please check the screenshot below on how to add the signature widget in form:  

Hope this helps.

Do get back to us if you have any questions.

Thank you!