Quote:
Originally Posted by kovidgoyal
You cannot, there are technical reasons why it is hardcoded to white, that would be too much effort to change.
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Hi,
It is possibles with Adobe Reader, and PDFElement as below:
Why not in Calibre?
https://www.youtube.com/watch?v=IO6KTVsZQkg
https://youtu.be/G2JiejYzORk?t=37