How to add "render element" layer at the frame buffer post work layers?

[Micha]

Hi,

I would like to get a simple z-depth fog at my renderings and my hope is to add it as layer. I can see "Render Element" but how to add them?

-Micha

[richard_aubin]

Found it in the docs here under Source:
Layers - V-Ray for Rhino - Global Site