Make sure that the Preview check box at the lower right is selected, and then move the markers until they just touch the main body of the image data.

Note the following aspects of this particular histogram:

> The high peak of data near the shadow (left) end, representing the darkest portion of the image (the barn's interior).

> The placement of the highlight (white) and shadow (black) markers, just below the histogram.

> How these highlight and shadow markers fall well outside the image data. This placement occurs when an image is not well exposed with proper placement of the highlight and shadow points.

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