You can use the following keyboard shortcuts for working in the FCurves window.
| Action | Keyboard Shortcut | 
|---|---|
| Select a keyframe | Click | 
| Select a keyframe region | Spacebar-drag | 
| Add keyframe to selection | Ctrl-click | 
| Select range of keyframes | Shift-click | 
| Frame all keyframes | A | 
| Frame selected keyframes | F | 
| Add keyframe on a curve | I-click |