Resolution is usually set at 72DPI (dots per image) but when we produce our final images the resolution needs to be set at 300DPI. This makes the photo the highest quality when printed and all the information will be kept. If you kept the images as 72DPI the information would be lost and if you changed the height and width of a picture the quality will be lost. When we change the image to 300DPI we need to change the size of the image because otherwise i would come out as a massive file and could crash your computer.
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