Using the e-signature widget

I have an e-signature widget on a form I created through you. How do I tell the person I email it to, how to sign it? Do they use their finger on their computer screen?

The user can use the mouse for e-signature widget. They can also use their finger if it is a touchscreen. They can also use mouse pen if it is available. 

Hope that answers your question. Let us know if you need further assistance. Thank you.