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