These are the all the possible fields that can be put into a contact form. You can choose to remove these fields, but you can't add others. You are also able to alter the place holder text for these fields (ie. First Name, Last Name, Country, etc.)
You are able to add more options into the "Reason For Contact" drop down. With these options, you can choose a different email the form gets sent to.
You are able to choose the default email address this contact form gets sent to, the subject line of that email, where the user gets redirected to after submitting the form, and an error message (ie. "Email not sent! Please try again later.").