About Managing Key Frame Sequences
When you click 
Manage Key Frame Sequences, the Key Frame Sequences dialog box opens. Select one of the following commands:
Manage Key Frame Sequences, the Key Frame Sequences dialog box opens. Select one of the following commands:• New—Creates a new key frame sequence. The Key Frame Sequence dialog box opens.
• Edit—Edits the selected key frame sequence. The Key Frame Sequence dialog box opens. You can change the reference rigid body, the status of the individual rigid bodies included in the sequence, and the order or the timing of the snapshots included in the sequence. Any changes you make to a key frame sequence affects all instances of that sequence used in the current animation.
• Delete—Deletes the selected key frame sequence. If you want to remove an instance from the animation without deleting the master sequence, select the instance from the timeline and click Remove.
• Copy—Makes a copy of the selected key frame sequence. The new key frame sequence is named copyofname, where name is the name of the selected key frame sequence. For example, if your key frame sequence is named open, the copy is called copyofopen.
• Include—Includes a copy of the selected key frame sequence in the animation. You can have multiple occurrences of a key frame sequence in an animation at different times. A key frame sequence included in an animation is called a key frame sequence instance. Each inclusion of a key frame sequence will be named with a n extension, where n is the next available number for that key frame sequence. For example, if you include open2 in the animation, it will be called open 2.1.