Customer Contact Details in QB DT Enterprise

On the main Customer tab, where it lists the Customer/Company info like the billing address, shipping address, phone numbers, etc.... there are several dropdowns for choosing the type of contact information. Is there a way to edit these dropdowns so we can make them more specific for us? Example, I'd like to have one email field says "PM email", another say "A/P email". I just don't want to have to remember that we always put the PM email in the "main email" and A/P email in the "cc email". With several people inputting and editing this info if one person doesn't remember what goes where, things get mixed up, so more specific names would be very helpful to us. 

Thanks!