Definitions for "Lens Shift"
When the optics of a projectors lens is used to move an image up, down, left , or right on the screen.
A feature of a projector that shifts the optical lens in any direction to avoid keystoning and other anomalies.
The Lens Shift feature of a projector allows the optical lens to be physically shifted up and down (Vertical) or left and right (Horizontal). This allows for adjustment of the projected image.