Hi EarthCry,
To set the correct value of activation at specified time, you just have to modifiy the key value in parameter panel when selecting the key in the track.
![](//forum.smode.fr/uploads/default/original/1X/495c25c5d65ddc2691ab27958f0c24da069fd7b1.gif)
Note that instead create an activation parameter track in timeline, you could also create a complete element track by draging the layer in the timeline.
This will allow you to manage fade in fade out and preloading.
Hopping all of this can helps.
Best regards