//graymachine.com
The idea is that you can apply the equivalent 3D location to any 2D location. This might not sound exciting. But, think of all the 2D parameters out there, like lens flare location, Shine source, beams, etc. It is probably my most commonly used expression.
But, the basic idea is this:
layer = thisComp.layer("Null 1")
layer.toComp([0,0,0])
Note: I intentionally left off the semicolon, as you techinically don’t need it in this case. Therefore, all you need to do is pickwhip your layer where the “layer =” variable is.javascript:void(0)