SINGER 7412 - Manual (Page 40)

40
MULTI-STITCH ZIGZAG
This is a strong stitch because as its name implies, it makes
three short stitches where the normal zig-zag makes only one.
For this reason it is highly recommended for overcasting all
types of fabrics.
It is also ideal for bartacks, mending tears, patching, sewing
towelling, patch-work and attaching flat elastic.
SETTINGS :Presser foot - General Purpose Foot
:Thread tension control - 4
NOTE: Mending a tear or overedging as shown in
illustration requires manual adjustment of the length
control.