NINA Dome-following question.

I have grasped the nettle of “dome automation” I have a 2.7m Pulsar and EQ8 mount inside. I have installed the Pulsar ASCOM driver. All good so far except ASCOM platform is V6, not V7 (hopefully no matter). I have configured the dome, and NINA keys can move the dome. The question arises from an on-screen indicator that says:
Dome following via NINA is OFF.
The manual doesn’t explain how to switch it on. A simple answer i hope. There are three images attached.
Tim
(Oxfordshire)