Thank you!!!
In order to obtain what I was looking for I’ve add as custom CSS the following code and it works great:
#supersized li.prevslide img, #supersized li.activeslide img#supersized li.prevslide img, #supersized li.activeslide img{
top:0!important;
}
Now I’m going to add a media query to have it only on desktop and not on smart phones.
Have a great day and happy Christmas