FormsPlus from Chillidog Form Submission Template question

In the FormsPlus form submission template, there is a facility to send a send a submission confirmation to the person who filled out the form. My question, is how does the form know the email address to send the form to? There is a setting to add an email address but the form needs to get that from the form itself.

So if you add a field to get the form filler’s email address and save in a field called email , what do you do with that to get the form submission to go to email?

The FormsPlus documentation doesn’t appear to explain this.