The projection screen size (or size of images) is determined by the distance between the lens of your Screeneo S4 and the projection surface.
- To enlarge the screen size up to 450 cm (177"): move your projector away from the projection surface. The device can stand at a maximum distance of 200 cm from that surface
- To reduce the screen size up to 30 cm (12"): move your projector closer to the projection surface. The device can stand at a minimum distance of 80 cm from that surface
You can also use the digital zoom, to crop the image and then enlarge the pixels to increase the size of the projected picture. This allows for your projector to be placed further away from the screen whilst projecting a larger image
These are the recommended sizes:
Once you have met your desired projection screen size, you can adjust the image quality by reading this article.