Gets or sets a value that indicates whether bookmarks are initially closed (bookmark children are hidden) in the navigation panel after a document is loaded.
true, if the bookmark children are initially hidden (closed) in the navigation panel; otherwise, false.
The bookmarks have a tree-structured hierarchy in the navigation panel. Use the IsInitiallyClosed property to specify the initial bookmark child state (closed or opened) after a document is loaded.
For more information, see the Bookmarks topic.