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Getting Before And After Previews

 

If you’re applying a correction filter, such as the Unsharp Mask filter, you can get a before and after view of your image even before you click the OK button (and then press Command-Z [PC: Control-Z] to undo/redo the filter). Instead, click-and-hold on the preview box inside the Unsharp Mask filter. When you click-and-hold, you get the before preview in the window; when you release the mouse button, it shows you how the image will look with the filter applied. Pretty handy. If you need to see the full preview onscreen, you can toggle the Preview checkbox on or off. Another tip is to hold the Command or Option (PC: Control or Alt) button while in a filter dialog, and then your cursor changes into the Zoom tool. You can then zoom in or out in your preview window by clicking within it.

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Once You’re In CMYK Mode, Stay There

You’ve read some techniques in this chapter that require you to be in either RGB mode or Lab Color mode; however, if for any reason your image is already in CMYK mode, do not (I repeat, do not) convert to RGB or Lab mode for any reason. Once you’ve converted to CMYK mode, the data loss from the conversion has already occurred, and switching back to RGB mode won’t bring back those lost colors. What’s worse is, if you switch from CMYK to RGB (or Lab), when you convert back to CMYK mode, you’ll go through another CMYK conversion and damage your image even more. The moral of this story is-once you’re in CMYK mode, stay there.

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