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+Koreader has image viewer for better viewing images within EPUB files.
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+Press and hold on image within document to open image in ImageViewer. After that you can zoom, pan, etc. image in full screen view.
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+For zooming you can use pinch and spread on devices that support it and on devices that don't support it you can use vertical swipe on sides of image to zoom in and out.
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+More info on image viewer can be found [here](https://github.com/koreader/koreader/pull/2519), [here](https://github.com/koreader/koreader/pull/2522) and [here](https://github.com/koreader/koreader/pull/2493).
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