ZPlugin Palette
From ZBrush Info
A plugin is a script or program seperate from ZBrush, that can be loaded into ZBrush to provide additional functionality. The Zplugin palette is the default area in which controls provided by ZBrush plugins are shown. For example, here is a snapshot of the Zplugin palette with a particular set of plugin controls shown:
Many of the controls shown above do not come standard with ZBrush, but are provided by plugins that were loaded into that particular session of ZBrush. Check the ZBrush site for such plugins.
Note that all plugin controls are not necessarily shown in this palette; plugins may also locate controls in other areas of the ZBrush interface, if the author of the plugin decides such controls are more appropriately located in another palette.
For information on how to use a particular plugin, please see the documentation that comes with that plugin, or related discussions in the ZBrush forums.
