In order to view a 500x500 image at 300 dpi, it would have to be displayed or printed on a device capable of 300 pixels per inch -- eg. a printer -- and would show up as 1.67 inches per side.

Or you could scale the image on a wrong-DPI device so that it is of the correct physical dimensions when shown. (Depending on the device's capabilities, you may lose detail.) Nevertheless, your underlying point was that DPI on image files or display devices is largely a tacked-on number most programs don't care one bit about.

In reply to Re^2: How to create images with 300dpi? by Anonymous Monk
in thread How to create images with 300dpi? by aky

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