A Boolean value indicating whether the expanded items are automatically saved across launches of the app.
- macOS 10.0+
When the value of this property is
true, the outline view saves the state of its expanded items and restores that state the next time the user launches the app. (If the outline view’s
autosave property is
nil, or if you have not implemented the
outline delegate methods, this setting is ignored and outline information is not saved.) The configuration data is saved separately for each user and for each app. The default value of this property is