Some presser feet require using the included adapter and screw (small), for example, the free motion echo quilting foot āEā and so on.
Remove the presser foot. (Replacing the Presser Foot)
Loosen the presser foot holder screw to remove the presser foot holder.
Remove the presser foot holder screw completely from the presser foot bar.
Set the adapter on the presser foot bar, aligning the flat side of the adapter opening with the flat side of the presser foot bar. Align the screw holes in the adapter and presser foot bar, and then securely tighten the presser foot holder screw with the screwdriver.
Turn the included screw (small) 2 or 3 times with your hand.
Attach the presser foot, referring to the manual for the presser foot. Tighten the screw (small) with the included screwdriver (large).
The illustration below is for walking foot (sold separately).