I have been looking for a couple hours and cannot find the answer. When a customer checks out they are asked to submit user data fields, such as "How did you hear about us?" How do I include this information in a notification to admin, or in the Invoice that is generated?
I know how to access the area for editing notifications and the invoice, but I do not know the proprietary CS-Cart code to add the user data fields.
Any help would be much appreciated!