The resolution is usually set to 72DPI (dots per image) but when we produce our final image we need to set the resolution to 300DPI. This means that the image is at a high quality when printed and all of the information will be kept. However if you kept the resolution to 72DPI some of the information could be lost. Also when changing the DPI to 300 we need to change the size of the image this is because if you didn't it would come out as a big file and will cash your computer.
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