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Chapter 14: Optimizing for the web and
e-mail
Optimizing images
About optimizing
Optimization is the process of compressing an image and setting display options for use on the World Wide Web or
in e-mail. When you send images by e-mail or put them on the web, you need to think about file size. The goal is a
file size that is small enough to allow reasonable download times but that preserves colors and details to your satis-
faction.
Three major graphic file formats are used on the web: GIF, JPEG, and PNG. You can optimize images in these formats
using one of the following methods:
To precisely optimize an image for use in a web page authoring application, such as Adobe GoLive, you can use
•
the Save For Web command. The Save For Web dialog box lets you preview your image in different file formats
and with different optimization settings. You can also set transparency and animation settings.
For basic optimization, you can use the Save As command. Depending on the file format, you can specify image
•
quality, background transparency or matting, color display, and downloading method.
Using the Save For Web dialog box
Use the Save For Web dialog box to preview the effects of different optimization options on a photo you want to share
on the web. The process is simple: Open a photo in the Editor and choose File > Save For Web. Then choose a format
from the Optimize file format menu (GIF, JPEG, PNG-8, or PNG-24) and set options as desired. (The file format
menu is directly the Preset menu.) This saves a copy of your file, without overwriting the image.
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