Right now I have several layers' opacities that I'd like to control by moving a Null object around. Right now I an expression on one of the shapes that looks like this:
if (thisComp.layer("Null 4").transform.position
This works great when the Null moves to the left, but I can't figure out how to make it disappear when I move the Null to the right of the layer. I'm new to expressions and feel like I'm leaving out something fairly obvious.