During import the program allows you to paginate your chart into divisions or sub-charts. After import these division breaks can be changed manually or they can be redone through the resync process.
Create Divisions: Resync wizard
To repaginate division pages automatically, go to Resync Properties in the Data tab. Step through this wizard until arriving at the page shown below. Here you have options: Do not create puts all boxes on a single page; At Level introduces division breaks at specific management levels; Every is an easy way to break divisions at a constant management level; Using division name breaks division pages based on a data field.
After checking the desired option, click Finish. Finally click on the Resync Data command on the Data tab.
At this point the Division / Sub-chart breaks should be apparent.