I’m a newbie and really don’t know about customize UI back to the default. After I mess up and press all button then it’s look like this :
Standard brush left side disappear so now I’m verry confuse.
Help me please!
9golfy 
ZBrush 3.0 is no longer supported. You should upgrade to ZBrush 3.1, free to registered users.
To update, use the CLICK HERE link found on this page: http://www.pixologic.com/zbrush/upgrade/
After you have updated to 3.1 you will find buttons in the title bar for switching between interface layouts, as well as interface color variations.