Kenmore 12493 Owner's Manual page 8

PRESSURE REGULATOR
Push down the outer ring of the pressure regulator. This will release the pressure on the
presser foot. (See above).
To increase the pressure, push down inner pin until suitable pressure is obtained.
Insufficient pressure may cause poor feeding of the fabric, skipped stitches, or difficulty
in guiding the fabric. If feed dogs or presser foot marks appear on the fabric, reduce the
pressure.
When sewing multiple thickness or heavy fabric, reduce the pressure. Increase pressure
when sewing lighter weight fabrics.
PRESSER FOOT LEVER
To aid you in the placement of heavy
fabrics under the presser foot, the lever
can raise foot beyond the normal "up"
position. This is also an aid in changing
your presser feet,