Flows can become large and complex and may need to be updated by people other than their original creator. To help ensure that flows stay readable, it's possible to add notes to a flow's canvas. These do not affect the behavior of the flow in the assistant but will be available to read by anyone editing the flow.
Canvas notes can only contain text, but any URLs will automatically be turned into clickable links.
For details on creating and editing canvas notes, see Add canvas notes.