I have tried everything I can think of, but when I reduce resolution of graphics, keeping the same dimensions, it has no effect on the size of the file.
This makes no sense. I prepare graphics for the web and so I often want to drop some weight by lowering the resolution of an image from, say, 300 ppi to 72 ppi. It would seem, intuitively, that this would lower the size of the file. Yet, when I do it, the file size stays the same.
Is there something I'm missing? I've tried with resampling on and off, to no avail.