How to enable and configure correlation id projection?

Hi,

I want to enable and configure correlation id projection in
EventStore, but so far haven't figured out how to do that from the
docs.

Enabling the projections seem to be done with putting this into the config file:
RunProjections: System
StartStandardProjections: true

Which is technically not what I want, as I ONLY want the correlation
projection. But for now at least it works.

The second part is to put this config into the correlation id projection:
{"correlationIdProperty":"id"}

I've looked all over the docs ("System Projections" and "Configuring
Projections") but just can't seem to find how to put this into the
config files.

Any ideas?

thanks, Rickard