Navigate the Graph Editor graph view or Dope Sheet view area
To scroll the graph view vertically and horizontally, hold down the or (Mac OS X) key and -drag.
To scale the graph view uniformly, press or and drag or -drag.
To scale the graph view, press or and and drag or -drag.
In the Graph Editor, you can move to the previous or next view using the and square bracket hotkeys. (These are the same hotkeys that let you move between camera views in the viewport.)
To navigate through views using these hotkeys, click in the Graph Editor then press to move to the previous view, or to move to the next view.