Q 3...a tensioned screen is made of a relatively thin membrane material and when in the down position the material is "stretched" gently to eliminate sags and wrinkles, to yield a flat and smooth viewing surface. The tension is applied by the dead weight of a bar attached to the bottom of the screen and secondly via a pair of taut cords that pull across on the fabric, through a series of attached hemmed loops. Only a few manufacturers offer tensioned screens in a pull-down version, they are usually only available in motorized.