My first idea was to put that code in a trigger at 0 ms. But surprisingly, such a code only runs when the playhead comes back to that position.
I tried the creationComplete event for that instance of the symbol. But this happens before the playhead in the main timeline jumps to the position where the symbol is visible.
Any idea of the event I should capture ?
I got it : one level up, that is in a trigger in the main timeline at the position where the symbol is visible.
But I still wonder why a trigger at 0 ms is not run at initialization. To my mind, this is quite counter-intuitive : cannot understand the logic behind.