9) When you adjust the sliders under the histogram you will see how the changes affect the original image in the preview window. You will notice if you exaggerate with moving the cursors too much to the left or to the right. But this is not the best way do work, as you will only perceive visually the moment when the data gets clipped {see figure 11/font>}.

10) A better option is to use the histogram to set the limits to which to go with the sliders. Slide both the white and the black triangle to the ends of the histogram curve. This method is better than watching visually for any clipping, but you can still find it hard to see small clipped data {see figure 12/font>}.

11) Adobe has a solution for this problem. You must have the “preview” box checked for it to work. Press and hold the “Alt” key. With the key pressed, move the black triangle to the right. The entire image will go white. When you start to clip each color channel a certain color will show up in the preview screen. If you clip only one channel, you will see the respective colors (R, G, and B) or all of them together if you clip all the channels. Any areas in the shadow part of the picture which is not clipped will turn white. If you slide the black point until you just begin to see colors showing up in the image, you will have placed the slider at the point where data has just begun to be clipped. The same thing happens when moving the white point while holding “Alt”. When you release the Alt/Option key returns the image to how it actually looks {see figure 13/font>}.