Missing Bake button in Lightmaper

Hi there,
I make a scene in Unity 5.0.0b12 (64-bit).
Went to WINDOW > LIGHTING, Unity opens a tab, like it’s always does, but there is no Bake or Bake Selected button. (I’ve made some objects and lamps, checked them STATIC and BAKE LIGHTMAPS, selected them, but still same result.)
Than I made a new project, and still the same, no BAKE buttons.
On the other hand in Unity 4.6 (and older) everything looks OK.

My specs are:
Intel i5 2400K
16GB RAM
Radeon HD 7970 6GB
Windows 8.1 64.

Anyone can help?
Thanks

Go into the scene tab.

and under general gi settings set the workflow to “on demand”

Great, thanks a lot.
Problem solved

Don’t you know the Iterative mode will bake the necessary objects for you automatically when you make changes? It’s a great feature in U5. Why you still stick with the old workflow.

Hi, yep, I know, but for testing purposes I like to have baking under full control. But thanks