Adding detail lines Access the detail or header/detail form. Display the records using these procedures: If you are working with a detail form, click Inquire to display any existing records. If you are working with a header/detail form, look up the header record. Specify A in the line action code field of one or more blank detail lines. This field is the left-most field. Specify or select values for the fields in the detail lines you are adding. Click Change.