Advanced Effect Maker - Compression Ratios For Images
Some applets, which support image inclusion of some sort (such as background images or slideshow images), will store JPEG images into the SWF files with a specific compression ratio. This compression ratio can usually be changed. You must specify values between 1-100. This means that low values will give low compression (and thus a smaller SWF file), and high values will give high compression (and thus a larger SWF file). Be very careful when you specify this. On one hand, a low compression can give enormous SWF files, that may be cumbersome for your web page visitors to download. On the other hand, setting compression too high will decrease the quality of images included. This has to be weighed.
NOTE : This will not have any effect on GIF images.