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Photoshop in Focus

Whether working with a scanner, a digital camera, or stock photos downloaded via the Internet, it's always best to start with the correct pixel dimensions. The process of resampling—changing the pixel dimensions of an image without changing its content—can harm the appearance of your artwork. Here's a little exercise to show you what we mean:

1.
Open Photoshop and choose the menu command File, Open.

2.
Navigate to the Photoshop folder and open Samples.

3.
Select the Eagle.psd image and open it.

4.
Click twice on the leftmost button at the bottom of the History palette to create two identical copies of the file.

5.
With either copy active, use the menu command Image, Image Size. Select the Resample (Bicubic) and Constrain Proportions check boxes, and enter a new width of 212 pixels. Click OK.

6.
Switch to the other duplicate Eagle image and use Image Size to change the width to 848 pixels.

7.
Zoom in on all three images, as shown in Figure 4.13.

Figure 4.13. The original is at the top, the reduced copy is in the middle, and the enlarged copy is at the bottom.



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