If you are an experienced Joomla! 1.5 user, 1.6 will seem very familiar. There are new templates and improved user interfaces, but most functionality is the same. The biggest changes are improved access control (ACL) and nested categories.
Special positions are: sticky_left, sticky_right, notice, tool_bottom. You can use them for any module type. For using this, please go to Module Manager and config your module to your desired position.
You can disable by:
Go to Administrator » Template Manager » Your_Template » Tab: Advanced » Use special positions » select: No for all special positions
Go to Administrator » Module magager » Your_Module(by postion: sticky_left/stickey_right/notice/tool_bottom) » Status: Unpublish for that module
For customize module in special position
The solution is using Module Class Suffix. You can customize button, module content follow Module Class Suffix
E.g. Module Class Suffix: bg-white @bullhorn then: - Class of buttom is 'ico-bullhorn'. If without @... the default is 'icon-pushpin' - Class of module is 'bg-white'