Originally Posted by jimgo
Zigzag - really need this for bigger sails, in addition to the straight stitch that you'll want for the bimini/dodger and other pieces. If you can get one that does a double step zigzag (I think that's what it's called), that's even better. That's where each "line" in the zigzag is actually two different stitches, rather than just one.
Jimgo is describing what I think is called multi-point, multi-step. A three-point, two-step machine sews two stitches each way. A four-point, three-step machine sews three stitches. Too long of a single zig-zag stitch can be a snag problem.