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Review answers

1There aren’t really any advantages to using one application over the other for optimization. Both Photoshop and ImageReady can perform a wide range of image-optimization tasks. ImageReady has many Web-specific features that you won’t find in Photoshop, but image optimization is not one of them.
2A color table is a table that contains the colors used in an 8-bit image. You can select a color table for GIF and PNG-8 images, and add, delete, and modify colors in the color table.
3Browser dither occurs when a Web browser simulates colors that appear in the image’s color palette but not in the browser’s display system. To protect a color from browser dither, you can select the color in the Color Table palette, and then click the Web-shift button at the bottom of the palette to shift the color to its closest equivalent in the Web palette.
4By specifying a matte color, you can blend partially transparent pixels in an image with the background color of your Web page. Matting lets you create GIF images with feathered or anti-aliased edges that blend smoothly into the background color of your Web page. But, with ImageReady 7.0, you can also specify a dither to transparency.
5To create an image map, you define hotspot areas of the image using the image-map tools or by selecting layers and choosing Layer > New Layer Based Image Map Area. Then you use the Image Map palette to define the shape of the hotspot and link each hotspot to a URL address.


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