Unity sprite packer is disabled

Question

I am trying to open the sprite packer in unity, and when I go to window -> sprite packer it is disable. I tryed to go to ** Edit -> Project Settings -> Editor** as was suggested in http://docs.unity3d.com/Manual/SpritePacker.html but it didn't work.

I am using unity 4.5.2f1

Answer 1

Sprite Packer is a Pro Only feature:

Sprite Packer is a Pro Only feature. Free users can still use atlases created using 3rd party software. Currently there are no plans to enable this in Unity Free.