When the list is created the following fields are made available:
Last Name: Stores the last name of the contact.
First Name: Stores the first name of the contact.
Attachment: Stores any attachments associated with the contact.
Company: Stores the company that the contact works for and/or is associated with.
Business Phone: Stores the business phone number of the contact.
Home Phone: Stores the home phone number of the contact.
Email Address: Stores the email address of the contact.
When you drag the Contacts List block onto the page you will be prompted with a dialogue box with the following fields:
List Name: This field gives a name to the list. When the list has been created, this will the name that will be assigned to the list
Description: In this field, you will have the ability to put in a description of the list.
In addition, when opening the custom list, if you click on the custom code tab, you will be able to add in extra columns or features if you have powershell knowledge.