As with any Web page material, consider the following when testing a Flash Player file.

• The browser your audience is using. Preview your Flash Player file in Internet Explorer and Netscape Navigator, if possible. Ideally, you should try out at least one earlier version of each, too. Okay, so you probably won't, but don't say we didn't tell you.
• The resolution of viewers' screens. Test at least the following most common settings: 640 x 480, 800 x 600, and 1024 x 768. Remember that the amount of material that appears on the screen changes with the resolution. But if you preview at 640 x 480, you can be sure people with higher resolutions can see your entire movie.
• The color settings of viewers' screens. Common color settings range from 256 colors to 16 million. If you're using custom colors, some viewers may not see them accurately.

Professional Web site developers take this testing phase seriously. No matter how good an animation looks on your screen, if it doesn't translate well to a majority of viewers' screens, it's not a good animation.