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Short version: The only difference is the number stored in the metadata. Extended version: This number only recommends the "scale" when you are using a program that actually makes sense of it. These programs are used normally to actually print your document. Think of it as a Post-it saying: "Use this number, please". It only "recommends" because you can ...


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The best way to understand this is to suppose you have a photo to "blow up" or enlarge, and then when you enlarge it, you either have broad fields of .jpeg trash artifacts and it doesn't look very precise, or the human brain is saying "hey that's so simplified and smooth, where's all the detail?" So to sharpen it up for printing it as a giant poster, you ...


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