Is it possible to send downlink messages to the device?

After a message in Downlink message - #9 by bestes
It seem that an update was done for downlink message for The Things Network.

On my dashboard I have a button (0/1) for sending, I hope, a downlink message.

Does someone has made a try? Is there somewhere a sample or tutorial about how to send downlink message from Cayenne Dashboard ?

Regards,
Maurice.