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Photoshop in Focus

The difference between resampling an image and cropping is important. Using the Crop tool in its normal mode doesn't degrade image quality at all—the remaining pixels are the original pixels. Resampling, on the other hand, either creates pixels (upsampling) or throws them away (downsampling).

When you enter any value into the Options Bar while using the Crop tool, you've changed the nature of the procedure. Now you are resampling the image in addition to deleting areas of it. Take a look at Figure 20.37. The crop marquees differ in size, but the Options Bar shows the same values.


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