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To Examine an Individual Row in the Histogram

  • Select an object and move the pointer from the top of the Histogram to its bottom.
Each time the pointer moves to a new row, the box in the upper right corner of the Histogram changes to display the number of that row.
The black area on the left side of the Histogram is actually rows of pixels bunched together. When the rows are closer to the bottom of the Histogram (the "0" value), there are more dark values in the current object or group. When the rows are closer to the top of the Histogram (the "255" value), there are more bright values in the Histogram.
In the following Histogram, there is only one row of black pixels. This means that all the pixels in the current object or group have one brightness value: 69.
In this Histogram, the rows of dark pixels are bunched together at the bottom of the Histogram, which means that the selected object or group is fairly dark.
In this Histogram, the dark rows of pixels run all the way from the top to the bottom. There is a much wider range of dark to bright pixels in the selected object or group. The rows toward the top (brighter) area of the Histogram are longer. The longer the lines of pixels, the more pixels there are at that value in the current object or group.