The largest part of the main window, the Chart area, displays your organizational chart. You can manipulate this display in many ways: by selecting different chart styles, controlling the magnification, choosing the number of levels displayed, including or excluding sub-charts, and using other features. You can have multiple charts open at the same time, and view them individually, tiled, or stacked.
For more information, see:
Basic Visualization Techniques
Modifying Box Layout
Changing Chart Styles
Other topics under the Working with Charts sections