Jan, I tested that out on my 440 and the stitches look the same to me. I'm just really surprised that it does a zigzag stitch without being set on zigzag! Learn something new every day, I guess.
Frances

I ran into something interesting today while machine appliqueing. I had turned off my machine because I was not returning for a while, when I came back I set my length and width but forgot to select the zigzag stitch, it was left on straight stitch. I still got a zigzag stitch that actually laid flatter than the zigzag, I usually have to reduce the tension to get it that flat. Is this a quirk of my machine (Bernina 440), is there a difference in the stitches (they look the same)? Just curious.
Jan