The Palette box has a choice of 8 palette types.
The option Exact uses exactly the same colors in the palette as those that appear in the image. System Windows and System Macintosh use their espective default 8-bit palette that many times may not have any relation with the picture being processed. The process of London Web design 
palette uses the 8-bit palette that is mostly used by web browsers. The Adaptive palette is the most effective since it selects the most frequently used color in the picture and then uses it in the palette. Custom palette allows the user to create a palette.  Using this user can convert multiple images using the same custom palette. It is available to the user only after the user has converted the image using Adaptive or Custom palette.
  The reduction in their image file size can be of great help in making graphic intensive web page. You can try these it’s on your pictures to see the size difference. Remember that while reducing the file size of an image, try not to compromise with the image quality.
Transparent and Interlaced GIFs
Transparency and Interlacing are two feature that quite important for displaying images on the Web. As you already know transparent images have an invisible background. Transparency gives a very neat effect to the page and the image blend into the instead of standing out.
Transparency Transparency is restricted to only the GIF file format. While making images of  web design transparent you need to select the color you wish to make transparent .If your image has multiple similar colors as background then you can not make all this color of the image is one single color.
The Interlace Option in Adobe Photoshop.
When you view an interlaced GIF image on the screen you will see an effect similar to the “Venetian blind". You need not worry if your browser does not show this effect while displaying the image; it only means that the browser does not support interlacing. It does not mean that your image has gone distorted. So don’t panic!
Animated GIFs
Animated GIFs are very common on the Net. They too have a GIF as the filename extension. Animated GIFs are nothing but GIF files arranged in a sequence. They are placed in a sequence so that when the file is played, it gives the effect of animation. There are several GIF animation programs available that help in creating animated GIF builder for Windows platform is GIF Construction set by Alchemy Mind works. You can download this software from the URL http: //www.mindworkshop.com/alchemy/ gifcon.html. It is ser-friendly
software that allows you to create animated GIFs by just dragging and dropping images into a sequence. Animated GIF files do not need any plug-in or other helper application to run on the browser.
It is important to know when and where to use animated GIFs. You must know that animation used unnecessary can distract the readers and your page look sloppy.
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