When a NiFi instance is connected to a registry, an "Import" link will appear in the Add Process Group dialog.

Selecting the link will open the Import Version dialog.

Connected registries will appear as options in the Registry drop-down menu. For the chosen Registry, buckets the user has access to will appear as options in the Bucket drop-down menu. The names of the flows in the chosen bucket will appear as options in the Name drop-down menu. Select the desired version of the flow to import and select "Import" for the dataflow to be placed on the canvas.

Since the version imported in this example is the latest version (MySQL CDC, Version 3), the state of the versioned process group is "Up to date" (). If the version imported had been an older version, the state would be "Stale" ().