Hi and thanks for your message. There is no manual for MD yet. You can start at midiDR.com/help, there are a ton of YouTube videos, too, and of course we're here to help.
But we're VERY well-indexed by Google, so that's usually your best best for most things...
To create librarian parts... perhaps you mean global presets in MIDI Designer? If you google that you can get to the video on global presets in MD.
Glad to keep the conversation going.
Thanks, best!
Dan
Dan Rosenstark
Author & CEO