Kenmore 1206 Instructions Manual page 17

ZIGZAG CONTROL
To produce a zigzag stitch, turn the stitch width limiter B upward. As the knob is moved up, the stitch becomes wider.
The indicator on the stitch width control knob A points to the numerical setting. The width knob can be manually turned
to a higher number, but the limiter must be rolled downward to produce a narrower zigzag stitch. Zig-zag stitch width
Increases from No. I setting to the No. 5 setting. Straight stitching is possible only when the knob Is at thc 0 position.
Zig-zag stitching will be practical for repairing elastic garments, seaming knitted garments, overcasting seams, tacking
points of strain, binding blankets, and st_tchlng darts m mtcrfacmgs.