There are small photos below the large photo that you can click on to see that photo. You can also click on the small ( - ) and ( + ) symbols to move to the next photo. There is also a play ( > ) and pause ( II ) button to stop and start the scrolling. You can also go to full screen by clicking the last button on the right.
The viewer below will allow you to right click on the photo and bring up the (Save Image As) option. The controls on this viewer are a little different, the arrows on left & right side advance to the next 5 photos. (The 5 photos are show on the bottom.) The + & - move to the next or last photo and the center arrow is the play button.