title_body: Getting a separate page count per chapter
upvoted_answer: Kobo ereaders have two different reading engines, one for .epub files, another for .kepub.epub files.
  These two engines have some little differences, one is the way page count is displayed: for the entire book with .epub, for a single chapter with .kepub.epub.
  If you want to use this feature the simplest way is to rename the file extension, but it is advisable to use Calibre instead. If you install the Advanced Kobo Driver plugin it will automatically convert .epub files in .kepub.epub when you send them to the device, while performing some optimizations that you won't have if you simply change the extension.
  And, this is a feature of the reading device, not of the file itself: it's not coded in your ebook, it's the ereader that has it and use it when detects the file type: you won't get it in other devices even if you change the extension.