About the Subanimation Dialog Box
A newly-created subanimation references the ground body by default. Use the Subanimation dialog box to change the reference rigid body or the time frame.
1. Select the subanimation on the timeline. Right-click and choose Edit from the shortcut menu.
2. The Subanimation dialog box opens. Change the settings as required:
◦ Select a new reference rigid body.
◦ Enter a new start time after the selected event. This can be negative with respect to the selected event, but cannot occur before the start time of the animation.
3. Click Apply.