Thanks for the thoughts Dan! I’ve been able to write out an UP or DOWN expression:

var oneFrame = thisComp.frameDuration;

var previousFrame = time – oneFrame;

var currentPosition = thisComp.layer(“Blue”).transform.yPosition;

var lastPosition = currentPosition.valueAtTime(previousFrame);

if(lastPosition > currentPosition)… Read more

I’m building a modular Menu UI in After Effects but I’m having trouble figuring out how to write the expression for part of it. I’ve included a GIF mock-up of what I’m trying to attempt to give some clarity.

Specifically, I have a list and a header and when you scroll down the list the header slides up out of frame. So far so good. However…

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