Not even about scaling up. It's about the loss of resolution and loss of readability. So for eBooks with images larger than 800x600, they get reduced. It's best to leave the images alone and set your output profile to tablet.
For a cover, you do want (if you can get) it to be at least the resolution of the device.
Last edited by JSWolf; 11-11-2016 at 05:28 PM.
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