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Photoshop CS4 for Windows and Macintosh: Visual QuickStart Guide by Peter Lourekas, Elaine Weinmann

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6. Pixel Basics

image

Before applying adjustment or image-editing commands, you need to make sure your document is the proper size and orientation and is cropped to your liking. In this chapter, you’ll learn how to change the resolution and dimensions of an image; change its canvas size; and crop, flip, rotate, and straighten it.

Changing resolution and dimensions

In this section, you’ll encounter three terms:

• The number of pixels a file contains is its pixel count

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