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Optimizing images for the Web


    To add an image to your Web page, the image must be saved in a format recognized by Web browsers and have a file size small enough to accommodate the bandwidth available to most Web users. Optimizing an image is converting an image to a Web format and removing enough image information to strike a balance between image quality and small file size.

    The file format you choose for an optimized image is determined by the color, tonal, and graphic characteristics of the original image. In general, continuous-tone images such as photographs should be compressed as JPEG or PNG-24 files. Illustrations with flat color or sharp edges and crisp detail, such as type, should be compressed as GIF or PNG-8 files. Vector graphics that are scalable or linked to scripts and variables should be optimized in SVG or SWF format. And if you're preparing an image for display on a wireless device, choose GIF or WBMP.

    Caution: Some browser versions do not display PNG format correctly.

    Depending on the format, you can specify image quality, background transparency or matting, color display, and downloading method.

    Note: GoLive supports ColorSync color matching technology that assures reproducible colors on different output devices.

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