How to add signature field in PDF for touchscreen Tablets and Mobile devices?

How do I add a signature field for those devices with the touch screen where people can sign with their finger or mouse?

I have tried adding the signature widgets on the form. Though they are displaying as a signature pad on the online forms. They are being converted to text box fields when we create a PDF form. If you want to use only the PDF version of the form, you may consider using a text field on the form and insert a table with a single cell as shown in the screencast below:

However, the signature captured can only be available on the PDF files received and this data cannot be sent to JotForm submissions. If you want the signature data to be sent to JotForm server, you will need to use the signature widget or a textbox field on the form.

Hope this information helps!