Hi everyone. I seen a post a while back that said something about if you push the white button "on top of the brainbox I think"

that there were some settings that you could access without having to use an ekey but I can't find it now. Am I remembering correctly and if so, does anyone know where I can find that post again or does anyone know what settings are available by doing that and/or the procedure (pressing once, a few seconds etc etc}?? I thought it was a post about volume where turning the jackpot reset key, you could change the volume but by pressing that button, there were additional volume settings and some other things.