Activation of Synchrotron Radiation process

Hello,
Coming back to Synchrotron Radiation after some break.

Let me reformulate my question:

I am using EM option 1 (EMV) . Shall I undertake some additional action/setting to activate SynRad or issuing the command :

/physics_lists/em/SyncRadiation true

is enough?
I am using this command without any additional action to activate SynRad and I do not see SynRad in the list of the processes.

Yuri