The glass reflects this text to the presenter, allowing them to read while looking directly into the camera lens.
In professional TV production, specialized operators manage the scrolling speed to match the presenter’s natural pace, handle script edits, and organize the "running order".
Modern Autocue systems use a beam-splitter glass—a sheet of glass that is reflective on one side and transparent on the other—set at a 45-degree angle in front of a camera lens.