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XML Structure Outline Preferences

To configure options regarding the Outline view, open the Preferences dialog box (Options > Preferences) and go to XML Structure Outline. It contains the following options:
Preferred attribute names for display
The preferred attribute names when displaying the attributes of an element in the Outline view. If there is no preferred attribute name specified, the first attribute of an element is displayed.
Enable outline drag and drop
Drag and drop is disabled for the tree displayed in the Outline view only if there is a possibility to accidentally change the structure of the document by such operations.