Using the Eyedroppers

The Set Black Point and Set White Point Eyedropper tools (Figure 3-14) let you assign target tonal and color values and then use those values to adjust shadows and highlights when you click in the image. It's a two-step process. To set the target values, double-click the eyedroppers and then enter a value in the Color Picker when it opens. For example:

1. Double-click the Set Black Point Eyedropper.

2. In the HSB (Hue, Saturation, Brightness) section of the Color Picker, enter a value of 5 in the B text box, and click the OK button (this will correspond to a maximum 95% dot on press).

3. Double-click the Set White Point Eyedropper, enter a value of 95 in the B text box, and click OK (this will correspond to a minimum 5% dot on press).

4. Move the cursor into the image window and Right-click (Windows), Ctrl-click (Mac OS) and select 3 X 3 Average from the pop-up menu.

5. While the Set Highlight tool is still selected, find a highlight in your image (watch the Info palette for readouts) and drag the Eyedropper over it. The highlights will take on the target value you set in Step 3.

6. Repeat Step 5 for shadows—obviously, first selecting the Set Black Point Eyedropper tool.

Figure 3-13: Left—Original. Right—Special effect created using the freeform Pencil tool to draw arbitrary curves in the composite, red, green, and blue channels and then applying the Smooth button. Below—Details from the Curves dialog box showing the arbitrary maps.

Figure 3-14: The Curves dialog box with the

Eyedropper tools highlighted. 81

The Eyedropper tools function exactly the same in Levels, with the added advantage of your having the capability to preview your image in threshold mode, which makes it easier to find the highlight and shadow end points.

The Set Gray Point tool, available only in color images, does not affect the tonal values, as does the middle, gamma slider in the Levels dialog box. What it does instead is to affect the color components and to bring them into line so that a colorcast can be diminished or eliminated altogether. To affect a colorcast, find an element that you think should be a neutral color and then click it with the Eyedropper.

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