[Kfir_frr Kfir_frr]

First thanks for your reply.
I work with Photoshop’s layers and some with transparency.
So the solution you gave me is good if I have a main control layer basis.
In my case, each layer adds some extra overall picture, so it must be one on the other and no next to each other like normal transition in Premier.
I tried the solution you gave is also putting in one layer over the other and it works pretty good but do not see the black line when I arrange the layers according to their priority in the picture and then sometimes hidden behind the black line any parts in the picture.

I’d love a solution or explanation on how to do it with after effect if it is more simple and convenient.

Thank you.