Normally, animation plays in chronological order. For example, a scene where you see character walking and then slipping is chronological. The actions in the scene unfold from start to end in a linear fashion.

Time discontinuity happens whenever action is shown out of chronological order, for example, when you start a story with its end. The Time Discontinuity option in the Story window lets you re-order events in a scene so that they occur out of chronological sequence.

Activating Time Discontinuity lets you play events in the animation in a different order, edit out parts, or loop the same segment more than once, without altering your source animation. For example, you could take the scene of the character walking and slipping and have the character slip first, followed by a shot of him walking.

Once you have edited the sequence of events in your scene, you can plot it for export.

When you activate Time Discontinuity, the shot clips and Shot slider tabs disconnect so you can move them individually to rearrange the sequence of events. You can drag a shot clip to a different time in the scene, or resize a Slider tab so that the segment of action repeats itself.

In the following figure, the scene of the character walking and slipping is shown in regular sequence. Each shot clip covers part of the action on the Character track below: the character starting to walk is covered by the first Camera shot clip, the character slipping by the second Camera shot clip and the character falling is covered by the third Camera shot clip.

In the next figure, Time Discontinuity is activated in the same scene. Now, the position of the first and last shot clips have been swapped. Even though the action on the character track has not changed, because the shot clips that have been moved with Time DIscontinuity activated, the first shot refers to the end of the action and the last shot refers to the beginning of the action.