SINGER 44S CLASSIC HEAVY DUTY - Manual (Page 15)

When sewing several layers or thick fabrics, the presser foot
can be raised to a higher position for easy positioning of the
work. (A)
The presser foot will remain raised as long as you hold up
the presser foot lifter. As soon as you release it, the presser
foot will drop back down to the intermediate position.
The presser foot pressure of the machine has been pre-set
and requires no particular readjustment according to the type
of fabric (light-or-heavy weight).
However, if you need to adjust the presser foot pressure,
turn the presser adjusting screw with a coin.
For sewing very thin fabric, loosen the pressure by turning
the screw counter clockwise, and for heavy fabric, tighten by
turning it clockwise.
It is suggested that you turn the screw in one quarter inch
increments so that it can be easily reset to factory settings.
8
Two Step Presser Foot Lifter EN
A
Adjusting Presser Foot Pressure