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5 Position the mouse cursor over the Z axis, and when it turns yellow, click
and drag upward to raise up the ball in the air.
As you move the ball up in the air, notice the Z value changing in the
Coordinate Display below the track bar.
The ball's position at frame 0 is now fixed above the box.
A Position key is created when you do this. The key is displayed on the
track bar.
The track bar displays the keys for whatever is selected in the viewport.
The track bar is found directly beneath the time slider and above the
prompt area.

Creating Animation Using Auto Key | 479