I'm finding this quite hard to explain, but let me try. Imagine you are projecting the image onto a glass transparent screen. I was under the impression that if you stood behind this screen and looked at the lens of the pj, the lens would be in the exact centre of the projected image (assuming using no lens shirt). However, the AE700 manual has left me a bit confused - it talks about having to choose a front desk or ceiling projection method, and seems to imply that the projected image is not central to the lens. For example on the desk setting, the lens would be at the very bottom of the projected image using the scenario above. When rearranging the lounge for the set up, I have assumed that the lens would project a central image - that the projector location would be central to my screen. It's probably a really stupid question, but can anyone put me out of my misery?!