Fict - that's only true if you turn re-sampling off. With resampling turned on, changing the DPI of the image also resamples the image to a new resolution. That's why his first step is to make change his image to 500dpi with resampling turned off. Then he has a starting point without any change to the image. All successive changes in DPI are with resampling turned on. Misha - I'm still looking for any discussion of the math behind it, why they are choosing what they do. For example, many of the Stair Interpolation techniques recommend you change image size in steps of 110%. Why 110? Dunno. -=>Donald