what I would do (and have done) is to position where you want it. Then click one of the seven little buttons to the left of the nano-preview (shown in the pic above). When the button is blue it has your camera info recorded (alt-click to delete info and clear the button). Now you can move your camera around, change views, etc. to help position your objects. When you're done, click that button again, and your view is right back where you had it.