Originally Posted by Cresha
On my janomes, if you push that little red button, the foot come off. The you line up the new foot and put the pressure lever down and it snaps right on.
But -- sometimes the foot requires that you take OFF the assembly with the little red button. So you must use the screw to remove it. Then this screw is used to apply the foot needed. Some feet do not use the red-buttoned assembly.