Back to Thumbnail Gallery  ? Click the arrow icons to view the previous or next picture. Alternatively, press the left or right arrow keys. To scroll horizontally for panoramic pictures, either click on the horizontal scrollbar, or hit <shift>-<tab> to toggle focus off of the main window, and then the arrow keys will work as usual. Hitting the <tab> key then returns focus to the main window and the left and right arrow keys will perform as described above.