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Chapter 9. Pictures > Enlarge or shrink?

Enlarge or shrink?

Scaling a bitmap picture in QuarkXPress affects its output resolution. If you shrink a bitmap picture in QuarkXPress, its output resolution will increase; if you enlarge a bitmap picture, its output resolution will decrease. Here's an example: Take a 150 ppi image and shrink it by half. Its ppi will increase to 300. Why should you bother to pay attention to this? Because enlarging a bitmapped picture above 100% in QuarkXPress will diminish its print quality. A vector-based image (e.g. an Illustrator EPS) won't degrade in quality if it's enlarged in QuarkXPress, but it may take longer to print. And if you shrink a picture down significantly, its file storage size will be much larger than required and it will also take longer to print. So the moral of the story is...plan ahead.


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