DPOF stands for Digital Print Order Format.  The DiMAGE 7 supports DPOF Ver. 1.1 so that you can specify the images and the number of copies to be printed and the print type.  This technology enables you to take your Compact Flash Card to a Photofinishing Print Service, or personal printer, which supports DPOF, and print the selected images at the number specified automatically.  DPOF also enables you to print an index print of all your images.