I experimented with the resolution settings in the gimp --> scale image
The resolution does not seem to have any effect on the rendering of the image
on a computer screen.
It has no effect on file size either.
I checked this by scaling and saving the same image in 3 different
(but no other changes):
72dpi, 300dpi, 600dpi.
When opening them again all were rendered at the same size on the screen.
I concluded that the dpi setting is only used by printers.
Is this correct?
Michael J. M. (via www.gimpusers.com)
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