Figure 7.5 Animation Controls
<Time variable>
Separates the bubble represented by the first, larger ID variable into its smaller constituent parts, which are defined by the second, smaller ID column. Select the bubble and click Split.
Reverses the action of the Split button by recombining the smaller bubbles back into their original bubble. Select any of the smaller bubbles in the group and click Combine.

Help created on 7/12/2018