Hmmm... thinks for a moment... I thought the DPI settings were for controlling print quality. More DPI means a sharper crisper printout (provided the printer is any good.) The DPI settings in most 2D graphics program more or less handle how such high resolution images are viewed by the program user. It basically compensates for the image size so that what appears to be about an inch on the screen is an inch on the printout. So that way a 300DPI image could be viewed on the screen. For most purposes though, a dot is roughly equivalent to a pixel. If that 300DPI had the view setting switched to 72DPI in the graphics program (or was viewed using a program that didn't use the interpolation data) you'd more than likely get a huge image that would require some scolling. Notice that the DPI value doesn't really change the amount of dots (or pixels for that matter), it just tells the computer how to go about displaying it or printing it. Either way, with a high or low DPI setting (independant of initial creation, as that sets the pixel or dot density provided initial dimensions are entered in in or cm.) - I'm willing to bet that the file would be the same size. As far as JPGs are concerned when it comes to bigger images - the quality loss becomes less noticable. This is because its data loss occurs at the dot or pixel level. The bigger the image density, the closer you have to zoom in to see the artifacts. It will always form 8x8 pixel (or dot for that matter) blocks once the distortion becomes evident. Dunno if that helped any, but that's my 2.

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