A piece of advice: If you want the slideshow to start directly when your visitor goes to your image gallery, choose one of the three last layouts where the big image is shown directly on the page. For the other layouts, visitors need only click on the image before the slideshow can begin.
Comment on images
You can also add a comment field to your images so that your visitors can comment on your pictures. Check the Show comment field box and a field will appear under the picture where visitors can write their comments. Comments are then displayed in the order made, with the most recent comment at the top.