This is sort of an old post by now, but I went ahead and wrote a script that does what you're looking for. If you've already solved this, then at the very least I was able to get some good practice out of it. :-) /* Opacity_Animator.jsx Performs a pre-determined opacity animation on selected layers ...

Hmmm... now I can't decide what I'd prefer. The first couple times I tried launching it through File > Scripts, I couldn't get it to work. I just assumed scripts that used GUI coding had to be launched through the Window menu, but since you mentioned that I tried it again and had no problems. Is the...

This is my first foray into using ScriptUI, so it's possible this is a really easy fix and I'm just missing it. I've adapted one of my own scripts into one that uses a GUI instead of dialog prompts to gather user input. Running the script from the Script Editor results in a single dialog window popp...