Click the 'flip' button (bottom-right of a zoomed-in image) to see image details.
Keyboard
Cursor keys to navigate between images.
Space-bar to zoom in/out.
'F' key to flip an image (when zoomed in).
Right-Click Menu
Go Fullscreen: Opens TiltViewer in fullscreen mode. Right-click and select 'Go Fullscreen'. Note that the keyboard navigation doesn't work in this mode.