Nikon 9235 Reference Manual - Page 65
maximum output value at the top., output value again, zero, or no color at the bottom and
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Input is plotted along the horizontal axis, with shadows (the dark areas of the image) to the left, highlights (the bright areas of the image) to the right, and mid-tones in between. The left end of the axis marks the minimum possible value for colors in the selected channel (zero, or no color), the right end the maximum value. In the case of the master curve, the minimum value represents areas of the input image that are a true black; the maximum value represents areas that are a true white. Output is plotted along the vertical axis, with the minimum possible output value (again, zero, or no color) at the bottom and the maximum output value at the top. When the cursor is moved over the curve edit display, the input and output values for the point under the cursor are shown in the input/output display. The input value represents the level of the pixel in the original image, the output value the level of the pixel after any changes to the curve have been applied. Apply check box Output Shadows Mid-tones Highlights Input Reference:The Tool Chest Input/output display Changes to curves only apply when the check-box at the top left of the Curves palette is checked.When this box is checked, changes to curves will be visible in the image being edited. The box can be checked and unchecked for a quick "before-andafter" comparison, allowing you to see whether changes to curves are having the desired effect. 64