General: Does ZBrush have BUILT-IN DOCUMENTATION?

Yes. There are two forms of it available. First, the Help button opens a browser system that lets you find help and tutorials on a variety of topics. Many of these topics have associated ZScript tutorials to illustrate the subjects. We have also designed the system for easy updating – watch for expansions to be made available in the future. In addition, if you hold down the Ctrl key and place your cursor over any interface item you will be given reference info for that element.

In regards to the Help Documentation, where exactly does someone find this Help Button or the Help Documentation? I am using zBrush 4R4 P2.