in the /gallery/galleries/slideshow_wide/css/themes/OLG.css file change:
.pg-sw-images img {
padding: 15px;
border: 1px solid #ccc;
background-color: #eee;
}
to:
.pg-sw-images img {
/*padding: 15px;
border: 1px solid #ccc;
background-color: #eee;*/
opacity: 0;
}
and add the following classes:
.pg-sw-images-visible {
opacity: 1;
}
.pg-sw-images-prev {
opacity: 0;
}
.pg-sw-images-next {
opacity: 0;
}
in the /gallery/galleries/slideshow_wide/css/common.css file, change
.pg-sw-images img {
/*padding: 15px;
border: 1px solid #ccc;
background-color: #eee;*/
}
to:
.pg-sw-images img {
padding: 15px;
border: 1px solid #ccc;
background-color: #eee;
}
to change the speed of the transitions, edit the /gallery/galleries/slideshow_wide/js/gallery.js file. look for the following line:
delay: 5000 //ms
and change it to your desired transition speed in ms.