Atomic shapes are singular shape entities, such as an image, a polygon, or text. Compound shapes are groupings of shapes, and are represented by WorksheetShapeGroup instances.

Currently, not all shape information is customizable (such as shape rotation). However, for round-tripping purposes, when a shape is loaded from an Excel file, this information in maintained with the shape. See ClearUnknownData for more information about unsupported data.

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