In Genei, there are a few different ways to take notes.
Resource Notes: These notes are tied to a specific documents. Each document will have its own resource notes.
Project Notes: These notes are tied to all the documents in a project. One set of project notes will apear for all the documents in a project.
Linked Notes: In Genei, you can create links between notes and documents. This means you'll always know where your ideas and information have been derived from.