The module automatically creates thumbnail images and save them in /thumbs sub-directory of your directory with images. Thumbnail images are created as per your parameters (dimensions and quality). The module will also create a Lightbox slide show. Click on any thumbnail image will open a larger image in the Lightbox pop-up. User can browse images (prev/next) in the pop-up while the rest of the website area will be faded out. Click on any point outside of the Lightbox slide show will bring the website back.