The image size projected by a projector is determined by the distance between the projector itself and the screen. Thus, adjusting the distance between your TCL SmartProjector and the screen allows you to find a suitable projected image size.
Moving the projector closer to the screen will make the projected image smaller, and moving the projector farther from the screen makes the projected image bigger. When you place the projector at a proper distance, you can get a suitable projected image size for a great watching experience.