Calibre E-Book Viewer
Calibre is a great tool to create ebooks such as EPUB format. I sometimes convert ODT format to EPUB format so that I can read some documents on my Android phone, using FBReader.
Recently I downloaded some PDF ebooks. And when trying to read from laptop, it causes eyestrain. Unlike journal articles, a journal article usually uses the layout of two columns. More columns mean that the text has narrower “width”, and it helps reader to track the line easily.
Another problem is the background colour. PDF viewer like Evince (from Linux) by default is using white background. The contrast of the font colour (black) and background colour causes eyestrain as well. Though Evince provides dark mode, it doesn’t help, as the contrast is still high. I tried to use Foxit Reader, which allows customization on the background colour. Yet, wide text is hard for reader to track the line.
Finally, I found that Calibre E-Book Viewer is the best one. The only drawback is the styling of the PDF is not retained. Nevertheless, the advantages are: custom font size, custom background colour, and custom text width according to the window. Besides that, it provides sepia light (yellowish colour) as one of the options for the reader. It is so far the best ebook reader that I found.