SINGER 14T957DC - Manual (Page 24)

THREADING TIPS FOR 5-THREAD SAFETY STITCH:
• Be sure to follow the threading sequence outlined above.
• Make sure needles are set-up in positions D, and B for 5-thread safety
stitch. This is very well illustrated in your manual on page 15.
• If you would prefer a wider 5-thread safety stitch, place the overedge
needle in the A rather than the B position when threading the blue
overedge needle. This will widen the overedge finish on the edge of your
fabric.
• When inserting the needle in positions A or B, loosening both screws A
and B will facilitate inserting and removing needles.
• Always reset the tension dials by re-selecting the stitch after threading the
serger.