File extensions that should not be compressed

The File extensions that should not be compressed field and the label below it specifies a list of file types that should not be compressed. The default extensions that are not compressed are .asf .gif .gz .jpeg .jpg .mov .mp3 .mp4 .mpe .mpeg .mpg .pdf .png .swf .tgz .wav .wma .wmv .z .zip. You can delete these from the "no compress" list by selecting them and clicking Delete.