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Lesson 8. Optimizing and Exporting > Exporting JPEG Images

Exporting JPEG Images

The GIF option exports 8-bit images, or a maximum of 256 colors, and works well for line art and images with solid colors. For photographs or any artwork with gradations or millions of colors, you'll want to export in JPEG format. JPEG is a lossy compression scheme, meaning that it looks at your image and removes information as part of its compression algorithm.

On the home page you are creating, you have some buttons, some text, the logo, and the images used for the disjointed rollovers. The GIF controls you set in the last exercise will work for all areas of the page except for the images in the disjointed rollovers. For these images, you want to use JPEG compression. You already have a slice over the exact area that you used to create the rollovers. You can simply select the slice and change the optimization settings for just that slice.


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