Sprite atlas creation option has all but disappeared!

I want to create a Sprite atlas as explained in the Unity manual:

But in the Assets > Create menu I can’t find the option “Sprite atlas”.

To be specific I have set the Sprite packer option in the Editor settings to “Always enabled”, but I still can’t find the Sprite atlas option…

what are your unity version. the spriteAtals menu Item In unity 2017.1.