“Does the projector have to be perpendicular to the screen/wall to get a square picture? Can the picture be adjusted square, if the projection is at an angle, maybe 45 degrees?”

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• The Keystone function for the LG CineBeam LED Projector with Built-In Battery, Bluetooth Sound Out and Screen Share, Model # PH550 is designed to prevent the screen image from becoming trapezoidal. It adjusts the top and bottom widths of the image if the projector is not set up at a right angle to the screen. Because the Keystone function may cause inferior screen image quality, use this function only when it is not possible to set up the projector at an optimal angle...^IFV

  Answered by LG Digital Customer Care 5 years ago

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