according to a 4 year-old forum entry at Calibre, they started working on the feature of being able to highlight text, 4 years ago. Does anyone know how if it is implemented yet and how to use it?
How can I highlight text in Calibre?
ebooks;calibre
Looking through the official bug tracker it would appear that this features hasn't been implemented and there is no timeframe given for when it might get implemented, if ever!Kovid Goyal (kovid) wrote on 2012-11-19: Re: calibre bug 1080721     #1The calibre viewer currently does not have support for highlighting. Itis on my TODO list, but there is no time frame for when I will be able toget to it. status wontfixChanged in calibre:status:  New  Won't FixThis was the full list of tickets that contained the word highlight in them, nothing there indicated it would be getting implemented anytime soon.There were other tickets such as this one too: [Enhancement] PDF to Kindle Highlighting.Kovid Goyal (kovid) wrote on 2012-12-11: Re: calibre bug 1088580     #1This is not worth the effort for me personally. If some one else wants to implement it, I will be happy to supply any needed guidance. If so, re-openthe ticket and we can discuss it. status wontfixChanged in calibre:status:  New  Won't FixAnd this one: Develop a highlighter for calibre ebook viewer on desktop PC.Kovid Goyal (kovid) wrote on 2012-12-25: Re: calibre bug 1093554     #1This is not worth the effort for me personally. If some one else wants to implement it, I will be happy to supply any needed guidance. If so, re-open the ticket and we can discuss it. status wontfixChanged in calibre:status:  New  Won't FixHopefully you see the pattern here at this point. I would say if it's a feature that you absolutely want you have a couple of options. You could:take up Kovid Goyal's offer and try and code this yourselfask him if he'd be willing to implement it for a feesee if anyone else would be willing to code this up