Hi,
On my B820, the stitch counter symbol is to the right of the mirror up and down symbol at the bottom left of my touch screen. It is basically a rectangular shape with 1,2,3 under it. Press this symbol to activate and your stitches will be counted.
I am excited about sewing hexies this way, as to be honest, I hadn't thought about it, and I do not enjoy English paper piecing.
You will have to look in your manual what the symbol is on later 7 and 8 series machines, because the computer system has changed and some of the symbols are different.
Hope this helps some of you.
Happy sewing,
Heather