Nodes let you gather related materials in one place so you can look for emerging patterns and ideas.
A Node is a collection of references about a specific theme, topic or a theory.
Here is a link to NVivo's guide to Nodes
It is often worth setting up a Node Structure before you start coding. This structure can be reviewed and changed as you analyse your literature and data.
Here is some suggestions for possible Nodes:
Be aware that these are just suggestions to make you start thinking about what you want to look for.
Right click in the Nodes to add a Node:
After you have created some Nodes you can start coding your Sources.
Open a Source and start coding:
Select a Node for the highlighted text:
You can add new Nodes while you are coding.