I'm pretty new to expressions in AE and I need some help. I need and expression that would link x position to x scale of a certain layer. As an example - when I change the x-axis scale of some layer I want the x-axis position to change too.
Also is there a way for an expression to only affect certain keyframes of a layer?
How much to the left? I don't understand the part about "a certain keyframe". What is it that are you trying to do, exactly? To come up with an expression, you need a very precise definition of the requirements.