Zoom in or Zoom out and adjust distance (1 Viewer)

You are betetr off having your projector further away and the zooming your picture in (smaller) to fit the screen than having the projector closer and zooming out (larger) to fill the screen. The further away the projector is from the screen, the easier it is to have a more even light dispursement across the entire screen. When the projector is closer, you tend to get more of a hotspot in the middle of the screen and then fading to more dimmer areas to the sides of the screen. I would leave a little room for zoom through and not zoom ALL the way in to the minimum point.