The Navigation toolbar has controls for navigating the key window or curve window.
Navigation toolbar
With Pan you can click and drag the Key window to move it left, right, up or down. Pan remains active until you right-click to cancel or click another option.
Zoom Horizontal Extents is a flyout containing the Zoom Horizontal Extents and Zoom Horizontal Extents Keys buttons.
Zoom Value Extents is a flyout containing the Zoom Value Extents and Zoom Value Extents Range buttons.
In Track View, the Zoom controls are available from a three-button flyout. You can zoom your view of time horizontally (Zoom Time), vertically (Zoom Values), or in both directions simultaneously (Zoom). Drag to the right or upward (Zoom Values) to increase magnification, or to the left or downward (Zoom Values) to decrease magnification.
Zoom Region lets you drag a region in the Key window to scale that region to fill the window. Zoom Region remains active until you right-click to cancel or click another option.