The compression is automatic. It is similar to how PSD files are compressed. The compression is limited to the same color. Thus if you have a blue sky that is composed mostly of the same blue the PSD files notes the blue once and maps where it is. However if you had a pictures where every pixel was a different color there would be no compression. In a message dated 4/28/2005 2:11:02 P.M. Eastern Daylight Time, achalpashine@xxxxxxxxx writes: I have never seen an option of compressing a raw image
