Where should markings for special services be placed according to Domestic Mail Manual instructions?

The correct placement for markings indicating special services, as per the Domestic Mail Manual instructions, is above the address. This placement ensures that the markings are easily visible to postal workers and that the mail is processed with the appropriate services attached, such as priority handling or specific delivery instructions. Positioning the markings above the address allows for quick identification and efficient processing, which is essential in maintaining the flow of mail and ensuring that any special handling requirements are met. This placement stands out visually, helping ensure that it catches the attention of postal staff at various points of processing and delivery.