I've noticed depending on which gallery you use, it will give you the option of expanding into a full window slideshow or open in a kind of lightbox pop up slideshow. However, you can't choose between these options for every gallery. You get one or the other. This seems to depend on if you're using a "gallery" as opposed to a "slideshow" to display your images. I can't seem to find a work-around for it. Am I missing a setting somewhere or is this just the characteristic of the slideshow vs the gallery?