Hi Richard, good observation. The histograms are useful, but provide limited information. They should not be used as an indicator of how a given slider will behave in CR/LR. For example, two images -- one in focus, one slightly out of focus, but otherwise equivalent -- will appear to have similar histograms. When you examine the images themselves, of course, they will appear to be rather different, one being sharp, the other not. Consequently, the Detail tab's sharpening controls will behave differently on the two images. This is another example of how two images with similar histograms would respond differently to a given slider.