by Julieanne Kost
Option + (Mac) -dragging | Alt + (Win) -dragging any of the Sharpening sliders in the Detail panel in Lightroom will display a greyscale preview of the slider’s effect. Previewing the edges of the masks (created with the Detail and Masking sliders), can be helpful in determining which option is best for the image that you’re working on. As a rule of thumb, use the Detail slider to suppress sharpening in landscape images, and use the Masking slider to suppress sharpening in portraits. And don’t forget, it is best to view an image at 100% to see the effects of sharpening (as well as noise reduction) accurately.