The "front standard" - or the flat plate with the lens on it on my Speed Graphic - can shift upward by about 1.5 inches. It's how you get pictures of buildings without converging lines. That's one of the movements available on tilt/shift lenses. In this case, I used a level to make sure the camera was pointed straight ahead. At first, the top of the building was cut off. By shifting the front standard upward, I was able to include the top of the building without affecting the perspective. Most of the vertical lines are parallel in this shot (where the building is plumb, of course), but the effect is less pronounced with a lens like mine that isn't really wide angle. For a better non-Photoshopped examples of this effect, check this awesome shot from Ansel Olson on Flickr.