Originally Posted by geormes
Most of the time when I use this method I am able to select the font I want from my Nook and/or Kobo. I can also change margins, font-size, justification, and spacing.
This method does assume a non-DRM epub. If that is what you have and you convert the file this way, Calibre will keep your original file and label it Original_Epub. The converted file will just be epub.
Hey! That worked! Even better than what I wanted!