Byron,

I know you posted this many years ago, but did you ever find out if this was, indeed, possible?

Dan,

I'll have to do some more studying to take your suggestion properly, but I will keep that advice in mind as I google furiously. If you have any other ideas don't hesitate to send them my way.

Thanks!

Cory

Howdy, Long time After Effects user, proficient in expressions and this is my first foray into scripting. My goal is to create a script that adds an expression linked to slider controls to all selected layer parameters. If a selected parameter doesn't have any keyframes to hold the expression, it sh...