Provide a guide for the roller wheels. The vertical track is mounted to the jambs with brackets on each side of the door opening. The horizontal track contains a curved end called the radius (See Radius). In the closed position, the door is resting in the vertical track. In the open position, the door is suspended from the horizontal track. Sectional door track usually consists of 4 pieces: 2 vertical pieces and 2 horizontal pieces.

v, to move horizontally at a high rate of speed using a method best described as "body surfing" on the air. Typically done at the tail end of a skydive to seperate from other jumpers before deploying a canopy.

a manoeuvre where a skydiver achieves a high horizontal velocity relative to the ground.

To assume a body position that creates a high forward speed. Used to approach or depart from other skydivers in freefall.

1. In general, to slide the camera view either horizontally or vertically. In other software packages, known as pan. 2. In Maya Live, the activity of following a given point of colour or luminance (called a tracking region) on a 2D image over a period of time. A locator is created at this tracking region's position and is keyframed at every frame. With this tracking information, the solver can analyze the shot to extract 3D locations and camera or object movement. See also key, locator.

The track is the part that holds and guides the roller assembly. It runs vertically to the top of the garage door, then horizontally parallel to the ceiling.