The Apache NiFi documentation is available both online and within the NiFi User Interface
          (UI). The online documentation consistently reflects the latest NiFi version. If you are
          using an earlier NiFi version, content differences may exist between the latest
          documentation and the version you would need. You can access the documentation specific to
          your NiFi version directly from the NiFi UI:
        
          - Launch the NiFi UI.
 
          - From the Global Menu, select .