Returning to EJS model editing after a long hiatus I came to the disconcerting realization that I cannot remember what the orientation is of the axes of the 3D drawing panels.

Is the x,y plane the vertical plane with the z-axis front to back?
Or is the x,y plane the horizontal plane?

I'm now wondering how I was able to create simulations with 3D views in the past. :-)

As far as I can tell this is not documented in the EJS wiki. Have I overlooked documentation? If not then this is a documentation request.