You can use the Navigate, Zoom, Pan & Zoom, and Frame tools (available from the View 
Navigate menu, toolbar icons, and supra keys) to view a specific area of the graph.
To deactivate any viewing tool, press Esc or choose another tool.
Interactively increase or decrease the magnification of the graph by choosing View Navigate Interactive Zoom Tool, pressing the C key, or clicking the Zoom icon in the toolbar. The cursor turns into a small magnifying glass:
To zoom in (increase magnification), drag in the graph to define a region to enlarge, or hold down the left mouse button.
The region you draw defines the center of the region you want to see.
To zoom out (decrease magnification), Shift+click and drag. Drawing a larger region zooms out less while drawing a smaller region zooms out more.
To interactively increase and decrease the height of the view, right-click and drag up and down.
To increase and decrease the width of the view, right-click and drag right and left.
You can also zoom in and zoom out by choosing View Navigate Pan and Zoom Tool, pressing the Z key, or clicking the Pan icon in the toolbar.
To zoom in, hold down the middle mouse button. The zoom-in continues until you release the mouse button.
To zoom out, hold down the right mouse button. The zoom-out continues until you release the mouse button.
To pan, drag with the left mouse button. The pan continues until you release the mouse button or the Z key.
By default, you can zoom using the mouse wheel:
If desired, you can disable the mouse wheel zoom or restrict it to the Navigation tool so that you can use the mouse wheel with other tools. See Mouse Wheel in Camera Preferences.
You can pan to scroll the area shown in the graph by choosing View Navigate Pan and Zoom Tool, pressing the Z key, or clicking the Pan icon in the toolbar.
You can pan and zoom in the graph in any direction, including in constrained directions. You can use a number of different tools to pan and zoom in different ways.
Choose View Navigate Navigate Tool, press the S key, or click the Navigate icon in the toolbar.
To interactively pan the view, left-click and drag the mouse pointer in the graph.
To pan in a constrained direction, press Shift and left-click and drag in that direction.
To interactively zoom in, middle-click and drag to the left; to zoom out, middle-click and drag to the right.
To interactively zoom only horizontally, press Shift and middle-click and drag to the left to zoom in, and drag to the right to zoom out.
To interactively zoom only vertically, press Shift and middle-click and drag down to zoom in, and drag up to zoom out.
Framing sets the zoom and pan so that the curves or keys fit in the graph within a specified range.
Select the keys and choose View Frame Frame Selected Keys or Frame Selection, press the F key, or click the Frame icon. If no keys are selected, the selected curves or regions are framed.
To automatically frame all fcurves in the graph
Choose View Auto Frame. This applies when you open the animation editor with a selected object and when you update the selection.
If you have the View Selected Parameters filter active and you select one or more parameters in the animation explorer, their fcurves are automatically framed in
the graph.
You can set a default preference for whether Auto Frame is on or off in the Fcurve Editor Preferences property editor.
To center the fcurve graph around the timeline cursor's position
Make sure that the timeline cursor is visible in the fcurve editor. Then move the timeline cursor where you want it (in either
the scene's timeline or the fcurve editor's timeline) and choose View Frame Center Current Time.
If you're in Suite mode, you can also click the Center Current Time icon.
If there are frames displayed that go out of the range of those defined by the scene's timeline, that part of the graph is displayed with a darker gray.
