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These functions provide a system for displaying and manipulating
presentation graphics elements such as bar charts and pie charts.  The
presentation graphics functions can be further divided into three classes:

Display Functions

    These functions are for the initialization of the presentation graphics
    system and the displaying of charts.

Analyze Functions

    These functions calculate default values for chart elements without
    actually displaying the chart.

Utility Functions

    These functions provide additional support to control the appearance of
    presentation graphics elements.

The following subsections describe these function classes in more detail.
 Each function in the class is noted with a brief description of its
purpose.