http://www.usa.canon.com/cusa/office/products/hardware/projectors/lcos_projectors/realis_sx7_mark_ii?pageKeyCode=writeReviewPage
REALiS SX7 Mark II
20150
Features
Digital Image Shift
When displaying 16:9 content, the REALiS SX7 Mark II allows you to move the projected images up or down the screen into unused pixels - without adding any additional compression. This ability to "fine tune" the placement of the projected image can be useful when projecting onto a fixed screen, or when stacking projectors for increased brightness. 
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