A fixed screen, also referred to as a permanently tensioned screen. The surface of  the screen is a flexible, unsupported vinyl surface that is stretched flat yielding undistorted picture quality.

A rear projection screen where your projector sits behind the screen. It provides the best picture especially if there is concern with ambient light.

A motorized front projection screen conveniently operated by remote control or wall switch.

A manual  front projection screen which may be less expensive, but limited selection.