Lightroom's sharpening sliders, which are found in the Develop module's Details pane, offer sophisticated control. With just a basic understanding of what each slider does, you'll be able to produce images with crisp, clearly defined edge detail without introducing distracting noise or artifacts to other areas of your image.
Lightroom has significantly ramped up its sharpening control from previous versions. Instead of one slider, there are now four. Figure 4-56 For many, this added control will be welcome. For others, it may seem daunting. For those of you who don't want to spend a lot of time sharpening your images, I want to reassure you Lightroom's default settings are pretty darn good, especially if you are working with RAW files. There are also some out-of-the box sharpening presets that may be all you need.
Fundamentally, image sharpening is really just an exaggeration of contrast along edges, places where light and dark pixels meet. Lightroom's Amount slider controls the intensity of the edge contrast; the Radius slider controls how wide the edge is; the Details slider determines exactly what is an edge, and the Masking slider gives you more control over where the effects of the first three sliders occur. Let me show you what I mean.
The Amount slider controls the amount ...