Programming mode for Mira 3?

The Rega Mira 3 manual describes a programming mode that can be entered when powering up the amplifier. This allows for tweaking of some of the settings. Does anyone know how to enter into this mode?

E-mail your question to Chad Harper at Rega's US distributor, Sound Organisation -- he is very helpful.
Thanks J! Chad emailed me back straightaway with an answer and had some nice suggestions to boot.