digital signatures

I am told that your forms allow for digital signatures.  I do not see this option anywhere while creating the form.  Can you please tell me if you do in fact have this feature, and if so where I would find it?

We have several tools for digital signatures. You can see here more details on the widgets we have:

http://widgets.jotform.com/search/signature 

Let us know if we can be of more assistance.