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