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Chapter 9. Pictures > Pictures come in two basic flavors

Pictures come in two basic flavors

A picture that is created in a bitmap program, like Photoshop, Painter, or Live Picture, or that is scanned, is actually composed of tiny pixels. You'll only see the individual pixels if you zoom way in on the image. The important thing to remember about a bitmap image is that enlarging it above 100% in QuarkXPress will diminish its resolution and output quality, whereas shrinking it will actually increase its resolution and output quality. If you're preparing an image in a bitmap program or scanning it for output from QuarkXPress, you should plan ahead and be sure to save it at the appropriate resolution, orientation, and size. You can make simple color changes to a bitmap picture in QuarkXPress, like applying a Pantone tint to it (this won't produce a Duotone).

A picture that is created in a drawing program, like Illustrator or FreeHand, is actually composed of mathematically defined objects. These types of pictures are called "vector," or "object-oriented." A vector picture can be moved, resized, recolored, and yes, enlarged, without affecting its output quality at all. It will be crisp at 20% and crisp at 120% (though enlarging it much beyond 100% may lengthen its print time). The higher the resolution of the output device, the sharper a vector picture will print. A vector picture can't be edited in QuarkXPress, however. It can be resized, rotated, or skewed, but not recolored.


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