In the 3D Animation Properties you can load and store scenes. Scenes are simply part of an object tree or a complete object tree. This option can be used to obtain scenes from other experiments or to create pre-defined environments.
The Save Scene command of the File menu, allows you to save a scene on file. Only the selected object and all object below will be saved.
The Load Scene command of the File menu, allows you to open a scene from file and insert it under the selected object of the object tree.