ocr: Tools Mail Merge Helper ?x Create Data Source ? - X A mail merge data source is composed of rows of data. The First row is called the header row. Each of the columns in the header row begins with a field name. Word provides commonly used field names in the list below. You can add or remove field names to customize the header row. Field name: Field names in header row: Title FirstName Add Field Name >> LastName JobTitle Move Company StreetAddress Remove Field Name City MS Query.. OK Cancel