Cut the fabric in a circle about 2 times the diameter of the button. This is a picture of the the Fabric, tool and button shell
Place fabric in holder then press in the button shell. The fabric will fold over on the button shell. At this point you may trim away extra fabric if there is too much bulk.
Fold over the fabric and place the back of the button over the fabric. Using the blue pusher press the back into the holder
Using the blue pusher press the back into the holder. Pop the finished product out of the holder.
And this is the finished product.