I remember reading about that in my manual, but I’d forgotten about it. Thanks for the refresher.

I had been wondering about that little black button and I finely looked it up and found out what it was. Makes me wonder what’ other little tricks this machine has.

I didn't know it either and I have one on my Janome .

The Zig-Zag Foot A comes standard on all Janome
Sewing machines and is used for most utility sewing, from straight
stitch to zig-zag. The unique Black Leveling Button on the side will
help you over the hump when sewing over thick seams. The Zig-Zag Foot A
is also called the All-Purpose Foot or General Sewing Foot.

I have one and didn't know what it was for. Would have helped with the baby quilts and the binding at the corners was quite thick. Thanks!

I think I have one of those, who knew?