Adobe Photoshop CS2 On Demand [Electronic resources] نسخه متنی

Controlling Tonal Range

The Levels adjustment lets you adjust the tonal range of an image by giving you three slidersshadows, midtones, and highlights. Dragging the sliders precisely adjusts the tonal ranges of an image. In addition, the Output sliders lets you adjust the ink percentages used for the output to print. By adjusting the output ink levels, you avoid the overly black images that sometimes accompany printing images using high dot-gain papers.

Control Tonal Range

Open a document in which you want to change the tonal range.

Select the

Layers palette, and then select the layer in which you want to apply the Levels adjustment.

Click the

Create New Fill Or Adjustment Layer button, and then click

Levels .

Select the

Preview check box to view the adjustments directly in the active document window.

Click the

Channel list arrow to select whether to work on the entire image, or just one of the images default color channels (useful for color correction).

Drag the

Shadow input slider to the right to adjust the balance of black in the image.

Drag the

Midtone input slider left or right to lighten or darken the midtones of the image.

Drag the

Highlight input slider to the left to adjust the balance of white in the image.

Drag the

Black and

White Output Levels sliders left and right to adjust the percentage of ink used in printing the image.

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To load a previously saved Levels adjustment, click

Load , and then select and load the file.

Click

Save to save the current Levels adjustment.

Use the eyedropper tools to select black, white, and midtone points directly within the active image.

Click

OK .

Photoshop uses the Levels adjustment layer to apply the tonal changes to the image.

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