Null objects, while absolutely nothing but an empty axis system, are extremely useful. There are a number of ways to use Null objects in every aspect of Cinema 4D. In order to speed up that process of parenting objects to a Null object, just select the objects you want to parent and press Alt+G. This will create a Null object with all of your selected objects as children of the new Null. It will also collapse the Null so that everything is hidden in your object manager. This makes cleaning up your scene a breeze and saves you valuable time when grouping objects. Enjoy!