Click on the "gallery index icon" on the left to go back to the gallery index.
Note: Don't use the "back button" on the browser to navigate though the gallery.

Click the "fullsize icon" on the right to view images fullscreen! Click again to get back to this screen.

Gallery Navigation: left to right
Gallery Index | Next Set | - Previous Image | Thumbnail Images | + Next Image | Previous Set | Play/Pause| Fullscreen