ghanahost Hi
There is different height value used for different screen size.
You can add this code in custom css and set the height as per needs
.acm-slideshow .item{overflow:hidden;position:relative;height:1000px}@media (max-width:1199.98px){.acm-slideshow .item{height:600px}}@media (max-width:991.98px){.acm-slideshow .item{height:500px}}