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Sams Teach Yourself Mac OS® X Digital Media All in One by Robyn Ness

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Chapter 21. Introducing Photoshop Elements

Adobe Photoshop Elements 2 is an amazing digital graphics program. Essentially, it is a program that juggles numbers. Changing the numbers in the computer memory changes what you see on the screen. If you're good enough at math to know which numbers change, and by how much, you could make all those screen changes by hand. Most people aren't. (Besides, it would be terribly inefficient to make all the changes manually.) That's where Elements steps in. Let's say you want to draw a red line about halfway down the page. You could figure out the positions of the pixels to change and change the color of each one from white to red. That's too much work. Let Elements do it. You just pick up a paintbrush, choose ...

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