Rhino For Mac – Rotate World View Top 90 degrees

I created an alias using
_RotateView W T
which I think is rotating the world view in top view, as you can in AutoCad, in order to draw projected elevations from the plan directly without rotating the plan or elevations each time.
But it currently rotates at an unknown angle. Anyone know how to make it rotate at 90º increments instead?


On the Windows side this would be _TiltView _Angle 90