Hi James

It's the same with the MSR+ as the old MSR... hold down the Store button with the remote pointing at the speaker display whilst switching it on from the rear. It will go into standby and you can then select a source and operate as normal, the boundary settings are accessible via Fn + Left or right arrows. Once you have decided on the best setting, press Fn + Store and switch off again at the rear. I normally wait 30 seconds before powering up again as I've found it can blow fuses if you do it instantly!

Cheers

George