Data provided by the recovery manager are persistent information. With this feature you will be able to do regression, even if you have left the VisualMust environment, intentionally or not. See the "Interface Builder - Closing a Design" chapter.
The recovery manager is associated with a persistent Undo/Redo.
The recovery manager will memorize and keep trace of actions made during an Interface Builder session. For a same action, only the beginning and end information will be kept. In other words, if a component is moved, only its first and last locations will be saved. Intermediary coordinates while moving will not be saved, to limit resources used by the recovery manager. These information may be used by the recovery manager to restore your design after a system crash. They are also used by the Undo/Redo manager.