Lightroom 1.1 Sharpening Tip
With the new sharpening capabilities of the latest release of Lightroom you need to be able to tell how each of the sliders affect your image. Like with the Exposure and Blacks sliders, if you hold down the Alt key while adjusting any of the sharpening sliders the image will temporarily turn gray emphasizing how the image is effected. One of the great things about the new Lightroom sharpening, as evidenced by the image going gray, is that these adjustments are only on the luminance of the photo.