Use one of the following methods to pan, zoom, resize, or frame the animation curves and keys in the Curves view:
To pan, Middle-drag, or hold Alt and drag.
To zoom vertically, move the scroll-wheel, or hold Alt and Right-drag.
To zoom horizontally, hold Command/Control and zoom vertically.
To resize the Curves view, drag the double line separating the Curves view from the next track in the Track list.
To frame only selected animation curves or selected keys, press F.
To frame all animation curves or keys, press A.