When I run "ebook-convert INPUT.epub .pdf -h", it prints a list of the available command line options for that particular combination of input and output plugins. (Brilliant idea, by the way.)
However, it looks like the description for one of the items may be wrong, like at one point it was copied from another option but never updated and "finished".
Code:
--pdf-standard-font=PDF_STANDARD_FONT
The font family used to render monospace fonts
From looking at the GUI, it seems like this option corresponds to the "Standard font:" item in the PDF output options. The GUI allows "serif", "sans", or "mono" for this item, and I'm assuming this controls which font "family" is used when rendering text for which no font was specified.
The same problem is present in
the documentation about the PDF Output Options. From the word "generated" in the URL I'm guessing that this page, and the help text, are both automatically generated as part of your build process.
If I'm wrong about this, then how does "--pdf-standard-font" differ from "--pdf-mono-family"?