You can use the following keyboard shortcuts for Transport Control window actions in MotionBuilder.
| Action | Keyboard Shortcut | 
|---|---|
| Snap Timeline indicator to frame | Ctrl-Shift-click | 
| Play/stop | Ctrl-Spacebar or Ctrl-Up arrow | 
| Play backwards/stop | Ctrl-Down arrow | 
| Forward one frame | Ctrl-Right arrow | 
| Back one frame | Ctrl-Left arrow | 
| Go to start | Ctrl-Home | 
| Go to end | Ctrl-End | 
| Jog/shuttle audio and animation | J-drag | 
| Frame zoom bar on Start and End (full-size Zoom bar) | A | 
| Frame Zoom bar on selected keyframe region | F | 
| Frame Start and End of all animation (“Frame Take” function) | Ctrl-Shift-A | 
| Frame Start and End of a selected keyframe region | Ctrl-Shift-F |