Epson 835p For Home Theatre Any Good I Recently Purchased A PowerLite 835P And Mounted It To Ceiling. How Can I Get Image To Display Right Side Up?

I recently purchased a PowerLite 835P and mounted it to ceiling. how can I get image to display right side up? - epson 835p for home theatre any good

I drove my 835P projector Epson EMP supports the ceiling with blankets. The picture is great, but it is projected is upside down. I looked at the manual, but not the solution to be found. Any help would be very grateful.