The User Defined card displays any data for the Customer that might not have had a proper location within the Customer record.
The User Defined option is for the specific use of individual central stations. You add User Defined fields within the Manitou Supervisor Workstation to store additional necessary information about the Customer. Examples of this additional information might be salesperson information or internal accounting information.
You can edit data on the User Defined Fields Edit card. Since central stations define these fields, data entry is dictated by what has been added and by the procedures in place at your location.