Sprite Packer is always disabled [Problem]

Questions & Answers
1

Hello everyone, I’m trying to enable the sprite packer in unity 4.6, doing Edit → Project Settings → Editor and selecting Always enabled but the Window → Sprite Packer options is locked as you can see in the picture.

[1]

Why is that happening?!

Thank you for your help.

2

Sprite Packer is a Unity Pro feature.

You can pack them yourself in Photoshop or something.

You can also try Texture Packer