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About
images
Many different types of graphic file formats exist, but
three graphic file formats are generally used in web pages—GIF,
JPEG, and PNG. Currently, GIF and JPEG file formats are
the best supported and can be viewed by most browsers.
PNG files are best suited for almost any type of web
graphic due to their flexibility and small file size;
however, the display of PNG images is only partially
supported in Microsoft Internet Explorer (4.0 and later
browsers) and Netscape Navigator (4.04 and later browsers).
So unless you are designing for a specific target audience
using a browser that supports the PNG format, use GIFs
or JPEGs for broader appeal.
GIF (Graphic Interchange Format) files use a maximum
of 256 colors, and are best for displaying noncontinuous-tone
images or those with large areas of flat colors, such
as navigation bars, buttons, icons, logos, or other
images with uniform colors and tones.
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