In MANU, the library is represented by primitives and Other objects available in the right panel of Edit mode.
To learn more about Primitives, go to Primitives. Among More objects, there are Spot Light, Point Light, Speaker, Collider, and Animation.
You can combine primitives with other objects from the library to create interactive environments in your game.
All objects added to the scene from the Library will be included at the end of the object’s list in the Scene tree. If an object is selected, a new Library object will be added below it in the Scene tree.