A portable projection screen system includes a foldable structure defining a viewing area. A projector mounting assembly includes first and second mounting arms spaced a selected distance apart. Each of the first and second mounting arms including a horizontal projector member located above the viewing area and extending forward of the viewing area. A vertical projector member pivotally connects to a backside of the viewing area in a plurality of positions. Each of the plurality of positions locates the horizontal projector member at a different height above the viewing area. A projector crossbar member slidably connects and moves between a plurality of positions that are each a different distance from the viewing area.