That must be it - the buttonhole feature is somewhat automatic if it is built in so that would be what the "B" is for.
...have you tried out the buttonholer?
...and would love to see a pic of your machine!
just found this page with a variety of "American Beauties"
http://www.doubleveil.net/zssmp/americanbeauty.htm
Originally Posted by
ppquilter
On mine no cams and no place for cams. Mine is a deluxe zigzag, built in buttonholer though. So maybe manual----buttonholer?