Use the following keyboard actions to navigate the thumbnails in the Storyboard:
[right arrow] or [down arrow] to move forward through the thumbnails in the Storyboard.
[left arrow] or [up arrow] to move backward through the thumbnails in the Storyboard.
Page Up to return to the first step.
Page Down to return to the last step.
Home or Ctrl+Home to move to the <<Start>> thumbnail at the beginning of the visual test.
End or Ctrl+End to move to the <<End>> thumbnail at the conclusion of the visual test.