Singer CE-350 Futura Manual page 64

5. Carefully mark the position of buttonhole on your garment.
6. Place the fabric under the foot. Pull out the bobbin thread
underneath the fabric to a length of about 4 inches to the rear.
7. Align the buttonhole mark on the fabric with the mark on
the buttonhole foot, and then lower the buttonhole foot.
8. While holding the top thread, start the machine.
* Sewing will be completed automatically in the following order.
Fabric marking
Marque Marque du tissu
Marca de material
9. When sewing is finished, use a buttonhole opener to open
up the fabric in the center of the buttonhole.
Be careful not to cut any of the bartack threads.

Fabric marking
Marque Marque
du tissu
Marca de material
  3 
1 2
Mark
Marque
Marca
  
4 5 6
Buttonhole foot alignment position
Position d'alignement du pied boutonnière
Posición de alineación del pie de ojaladora
 8
7