A Note is a sticky note on the canvas — nothing more. It doesn't connect to any other node and it isn't part of the pipeline.
Adding one
Drag a Note onto the canvas from the sidebar and type whatever you want to remember: why a period was chosen, what a client asked for, something to revisit next quarter. Click it any time to edit the text.
What connects here
Nothing. A Note has no inputs and no outputs — it exists purely as context for whoever looks at the canvas next, including future you.