Switch to Work mode in the node network
Choose Node network from Figure style and Work from Interaction. The tools for marking connections appear.
Add a branch
Choose + Add branch and pick the two themes, codes or sub-codes to link. They can be in the same theme or in different ones.
Describe it
Add a note on why the two are linked, choose Empirical or Theoretical, and set a direction if one leads to the other. An arrow always points at the effect.
Tip: Empirical is a link you can point to in the data, drawn solid. Theoretical is one you propose, drawn dashed.
Show or hide connections
The Show connections menu offers All connections, Open theme connections and Hide connections.
Save your progress
Links marked in the viewer are written to the Connections file when you save your progress. You can also add links as rows in the Connections tab of your spreadsheet.