Nikon 9235 Reference Manual - Page 70

White-Point and Black-Point Sliders The white-point and black-point sliders can be used to match the white and black points to the histogram displayed in the curve edit display. To edit the white point or black point, click the corresponding slider once to activate it, then drag it to the right or left (a value can also be entered directly in the text box underneath the slider). Matching the black-point slider with the lowest input value displayed in the histogram will set the minimum output value for the selected channel to the darkest pixel actually present in the image, steepening the curve and enhancing contrast without sacrificing detail in shadows. Similarly, matching the whitepoint slider with the highest input value displayed in the histogram will set the maximum output value for the selected channel to the brightest pixel present in the image, enhancing contrast without loss of detail in highlights. Any changes are applied instantly to the active image. Black-point slider Black-point input value White-point slider White-point input value Reference:The Tool Chest 69