Under the B&W tab on that panel, you’ll also see a color sample tool you can use to easily adjust the final look of your image.
Under the B&W tab on that panel, you’ll also see a color sample tool you can use to easily adjust the final look of your image. If you use that tool to select an area of your photo, it will recognize the color that was captured in that portion of the image, and you can then adjust the levels for that color. It can be useful for things like lowering the blue levels to make a bright sky look darker in B&W.