Field help (HEAFLDOPT)
Parameter used to define whether the corresponding field, to be found in the document header, must be, for the set up transaction: ? invisible to the user (a default value is given to the field based on the document logic, but the user cannot see the value on the screen) ? displayed only (the default value planned in the document logic appears on the screen, but the user cannot modify it) ? entered (in that case, the user can see the value of the field and modify it provided that the field is valid).