How to Optimize Images for Your Web Site
Part of the Web Sites Do-It-Yourself For Dummies Cheat Sheet
No matter how great the content on your Web pages, the images attract the most attention. The keys to optimizing images so they download quickly from your Web pages are
Cropping and resizing images to display well a computer screen
Choosing the best format:
GIF or PNG for line art and images with limited colors, like logos and cartoons
JPEG for photos and other images with millions of colors
Photoshop Elements includes a Save for Web feature that makes it easy to optimize any image and save it in the best format for your site.