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Lesson 8. Optimizing and Exporting > Choosing the Image Format

Choosing the Image Format

The Export wizard does a good job of analyzing banner ads for you, but normally you will want to take control over the image optimization and export settings.

Picking the correct image format is crucial to the optimization process. The most popular file formats for Web graphics are GIF and JPEG. GIF images are generally used for line art and images with solid colors. GIF images can contain transparent areas and can be used for animation files. The disadvantage of GIF images is that they are restricted to 256 colors. JPEG is generally used for photographic images or images with gradients and more colors. JPEG files cannot be transparent or used in animations.


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