Repair / clone tool: how to select another image as source?

On their webpage DXO describe the new clone/repair tool of PL3 and state: “Areas can be manually selected and you can even use another image as your source”.
Has anybody managed to do so and can give insight how to select another image as source? No information in the manual on that.

It’s a mistake.
You cannot.
Pascal

O.k. Thank you!

Hello,

Yep, it’s a misleading info. It will be corrected as soon as possible.

Thank you,
Regards,
Svetlana G.

Would be great feature though!