had a play on sat , turned on white line on the 585

even turned on only 1% , it knocks out the whole bottom reading to just leave the tails and whatevers growing above. (you can turn right up to 50%)

seems most sounders have this function but i,ve not read about anyone using it.

is it more of a relic from the monochrome days or does anyone use it to reliably pick up anything???