Hi: You push out the needle retainer bar, past the needle you wish to change. Push the defective needle all the way out, push down on the needle and the butt of the needle should lift, take that and pull it out towards the back of the bed. Insert the new needle by holding it in a 45 degree angle and slide it into position, then push it back to A. With a ruler hold down the needles that have popped up when you pushed out the retainer bar (also called a sponge bar) move ruler along needles until retainer bar is fully back in the machine. If you need more help, let me know. Bernie