With ease one can organize content into virtual libraries, built-in e-book viewer/reader, download news/e-books /magazines from the web, share, backup your library, sync to e-readers, edit books and many more features to long to list here. The default selection is a white background with black text. Calibre is an amazing cross-platform open-source software for e-book management. (I reduced the sizes of the screengrabs.)Īs seen while editing in Writer (with dark mode UI)Īs shown by PDF-XChange Editor in 'dark mode'īeta Was this translation helpful? Give feedback. How To Set Night Theme In Calibre Ebook viewer And Switch Between Day and Night Theme EasilyEbook viewer-Prefrences - General - Set Background And Font Colou. Move the cursor around the color wheel until the desired color is selected. Again, text is shown as white letters on a black background, while image colors are unchanged.Īs an example, below are screengrabs of a document which I created in LibreOffice Writer and exported to PDF. Calibre complains that the filesystem is read only, so have a look whether it is true. Other interesting Android alternatives to calibre are KOReader, Librera Reader, ReadEra and Openlib. If that doesnt suit you, our users have ranked more than 100 alternatives to calibre and many of them are available for Android so hopefully you can find a suitable replacement. As long as Calibre isnt running at that moment nothing bad should happen. The best Android alternative is Google Play Books, which is free.

Unfortunately, it can't display epub documents.Īnother slightly different example is how 'dark mode' is implemented by these GitHub pages when viewed in Firefox or Chrome. Try opening the Calibre Library directory with a file manager and try to create a folder (directory) and create a file inside that folder (directory). In dark mode, it displays PDF documents with a dark backgound and white text but preserves the colors of embedded images. It'd be really nice if SumatraPDF did the same.Īn example is the free edition of 'PDF-XChange Editor' by Tracker Software Products. There are other document readers which implement 'dark mode' as I've described: they reverse text coloration but preserve image coloration. While inverting colors is an easy way to approximate 'dark mode', 'dark mode' and 'invert colors' are NOT the same.

Black calibre reader