Where is the object to terrain in the top menu?

Can’t find the object2terrain option in the top menu. I was reading the Object2Terrain page at http://wiki.unity3d.com/index.php?title=Object2Terrain and says this:

C# (updated):

  • Click on an object in the scene view or hierarchy.
  • Select from the top menu: Terrain->Object to Terrain.
  • A new terrain GameObject is automatically created.

Java (original):

  • Add a default terrain GameObject to
    the scene.
  • Click on an object in the scene view or hierarchy.
  • Select from the top menu: Terrain->Object to Terrain.
  • The object is then converted to the heightmap in the active terrain.

But I can’t find the Object2Terrain anywhere. I did the editor and script thing but the option never showed up. Sorry but I’m a noob at unity. If you can please help. XD

47659-object2terrain.png

As instructed, you need to save the script in the /Editor folder of your project.