You can switch quick properties in the Scene View on and off. Navisworks remembers the selected visibility setting between sessions.
When Quick Properties are switched on, you can view property information in a tooltip style window as you move your cursor over objects in the Scene View. You don’t need to select objects first. The quick properties tooltip disappears after a few seconds.

By default, quick properties show the name and type of the object, but you can use Property Sets to define which properties are shown. You can also use the Options Editor to choose whether to hide category names in quick properties or not.