Whilst attempting to navigate my graph view, clicking the note to edit/view is not intuitive.
I would suggest a setting where scrolling/ zooming in and out of the graph view would allow you to much easier navigate the feature, and interact with the graph much more intuitively. This would be similar to the way that Prezi allows users to zoom in and out of pages whilst doing presentations.
So when i graph view you see all notes and folders on the screen if you want to edit one you would simply zoom in on it specifically and it would open the note, when done editing the note you could then zoom out and go back to graph view.