Slow motion is often used in films to emphasize important moments by allowing the audience to see details they may otherwise miss. It can be used to represent key events or demonstrate skills. Zooming in and out focuses the audience on specific subjects, such as zooming out to establish a location and then zooming in on a character. Panning and tilting involve rotating the stationary camera horizontally or vertically to follow moving subjects or show things that don't fit in a single frame. Dolly and tracking shots smoothly follow subjects using a wheeled camera platform, with tracking moving the camera perpendicular to the lens axis and dolly shots moving parallel.