is there a way to have individual parts of a sprite animation to have low opacity *solved*

[RichardRasmus]

so basically i have this dash attack animation for one of the sprites where the sprite does a dash and behind it trails an afterimage of somewhat transparent versions of its self, problem is that their oppacity is set by the layers so any time i try to flatten them they turn solid, is there any way to keep this after image transparent while having the entire animation on one whole layer

EDIT: forgot there was an option for a sprite sheet, been sending the animations as gifs to my coder