provides a visual representation of animation keys, allowing you to view, edit, copy and adjust one or several keys at a time. This is where you control the timing of your animation, through the manipulation of keys, curves and ranges. You can also assign animation controllers to interpolate or control all the keys and parameters for the objects in your scene.
Track View has two windows, a Controller window and a Key window. The Controller window shows the hierarchy of linked objects, as well as the modifier stack and transform tracks. The Key window displays keys, curves and ranges. Keys are color coded to show what is animated.
Track View uses two different modes. displays key interpolation as curves, and allows you to edit the curves. displays the animation as a spreadsheet of keys and ranges. Dope Sheet has two modes, Edit Key and Edit Ranges.