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ok, before I wreck my library... i just need to be sure of how to do this correctly.
I'm not going to a paperwhite, but the Ipad kindle app.
How do I safely resize the thumbnail from within Calibre to test this? For example, I'm currently looking at metadata for a book which has a cover image of 326x500. I suppose I could copy that to a folder, then resize, then paste back into calibre, re-convert to be safe, then upload to device... but doing that for all my books seems like a nightmare... not to mention, I'm not sure if I should be resizing the main image or if calibre stores a thumbnail somewhere or something.
Any guidance would be appreciated.
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