Reply To: Single Product page – Show all thumbnails

Try to add the following code snippet to the Custom CSS area in Theme Settings

.thumbnails .owl-stage {
	max-width: 100%!important;
    transform: translate3d(0px, 0px, 0px)!important;
    -webkit-transform: translate3d(0px, 0px, 0px)!important;
    -moz-transform: translate3d(0px, 0px, 0px)!important;
}

.thumbnails .owl-nav {
	display: none!important;
}