Quote:
Originally Posted by gogu1904
Thank you both. I was reading an epub in KOReader and I got the cover rendered unscaled. And I imagined it was calibre's fault. But calibre reader renders the cover correctly. So it appears to be KOReader's fault.
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Maybe not

IIRC The default Cover setting is per format
Preferences: Conversion: <format>: <settings that affect covers>
The Above is for New devices.
Once a device (driver) has been used, calibre stores it as it was at the time.
Connect your device, then on the device icon (only shows when connected): Configure driver. Make the changes THERE