1. Tangles thread at the beginning: 1. Bobbin too full 2. Bobbin set in wrong direction 3. Under thread not drawn up 4. Both threads not pulled back under the presser foot 5. Machine not properly oiled and cleaned.

(a) Boat neckline (b) Cowl neckline (c) Keyhole neckline (d) Square neckline 3. This type of neckline is used in Jabla with cord. (a) Boat neckline (b) Square neckline (c) Draw string neckline (d) Scoop neckline 4. This neckline is otherwise called as pot neck.