I have a gound lift button on my Trace Elliot bass head. It's one of those little square buttons that has 2 heights. The picture next to it shows the button position for ground lift. The thing is, it's not obvious to me (because there isn't another picture showing the opposite) if it's showing up or down. I think it means if the button is up, the ground if lifted. Is there a button position that is more prevalent in music gear than another? I mean, does it seem more common to have the up position mean ground lift, or press the button for ground lift? I don't have another piece of gear to compare it to.