Figure 7.19. Here's a grayscale rendition using the Magenta channel.

[View full size image]

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6. Click on OK to apply the change.

7. Flatten the image (use Layer > Flatten) to create your grayscale image.

What if you want to emphasize some other tones? You can do that, too, with the Channel Mixer. Continue with these steps.

8. Chose Image > Undo to cancel the image flattening you performed in Step 7.

9. Create a duplicate of the background layer (use Layer > Duplicate Layer) and move it above the first Channel Mixer adjustment layer.

10. Select Layer > New Adjustment Layer > Channel Mixer and click on OK to create a second adjustment layer.

11. Click the Monochrome box as before in the Mixer dialog box, and then move the Yellow slider to the right while keeping the other sliders at the center point. This will emphasize the blue of the sky, as you can see in Figure 7.20.

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