You can find comprehensive online documentation for this product at
Calibre Documents Provider.
You can also watch the YouTube tutorials at
You can access all of the above from the
Calibre Documents Provider About Box directly from the application on your device. Here's a screen capture of the About Box - just tap on the link for your area of interest:
For support/queries/comments, please feel free to start new topics, or contact
support@kpwsite.com.