Umas THKS FOR THE INFO but i use the grayscale to set up my monitors, -- have done so since win 3. monitors generally come out of the box with everything ramped to the top - they want to sell monitors)) in the past i would scan a macbeth color card and compare things to my liking - from my darkroom days -- i try to set up to a "known value" example a Ontario automobile with its license plate showing -- it is white with blue letters when i did internal boiler inspections i would always include a known value in the first frame -- my critics knew that i could adjust the colour of boiler scale to make it look good but a Pentel pencil or a 6" ruler was a KNOWN value ken