BLIND STITCH HEM
With the fabric inside out, fold it to the desired size of the hem. (No. 1)
Fold it again with a 1/4 inch overlap on the bottom fold. (No. 2)
Set the zigzag width control knob at "3" and the stitch length regulator knob at about "2", and sew
on the fold. (No. 3)
Then unfold the fabric, and you will have a blind stitch hem. (No.4)