AFAIK Airbus OEM only says to dim the screens. For the previous 3 operators, this was only supplemented by a shared habit to turn the WXR radar intesity /ND - outer knob/ to the max whilst doing the above. And nothing more.
The present operator seem to have engrained crews with a non-written technique to set RMP OFF as well as to deselect the VOR/ADF switches to neutral. So now I am the one who leaves the cockpit untidy, apparently.