Diagram Optimize Shape Size Height and Width

What determines the dimensions set by the Jdeveloper 11g menu option of Diagram.Optimize Shape Size.Height and Width while editing a Database Diagram ?
I was hoping that this option resizes the dimensions of a box that represents a table to fully display all the columns, types and keys within the limits set by Tools.Preferences.Diagrams.Database.Max Compartment Entriesand Max Shape Width.
I set
Tools.Preferences.Diagrams.Database.Max Compartment Entries = 100
Max Shape Width = 1000
However, what I observe when using this option in a Database Diagram is that the box height is resized to show the first 15 column names and an ellipsis and the box width is less than the width of many of the column name rows.
Does anyone else think this is a bug? If so, I will open an SR.

Update:
The limits set by Tools.Preferences.Diagrams.Database.Max Compartment Entries and Max Shape Width affect the default values for subsequently created shapes and not existing shapes.
However, a Service Request has confirmed that changing the value for Max Compartment Entries has no effect. This behavior has been filed as a bug that will hopefully be fixed in the next release of Jdeveloper 11g.

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