ZBrushCentral

help with alpha

There is some time I don’t work with Zbrush. I interrupted my studies because I didn’t have a good machine to work with. But recently I decided to get back to study Zbrush, and I’m having some trouble about some commands. Can anybody help me? How can I configure the “alpha” that is created? I remember there was a way to configure how it faced black, gray and white, neutralizing gray, deepening the black and rising the white. I couldn’t find the answer for this problem. How can I do it?
Best regards,

Radael Jr

http://www.pixologic.com/docs/index.php/Alpha_Palette

Thank you very much.