You can use desktop preference tools to configure almost every feature of the desktop. Each tool controls a particular part of the behavior of the desktop. For example, you can use a preference tool to select a theme for your desktop. A theme is a group of coordinated settings that specify the visual appearance of a part of your interface.
For convenience, the tools are grouped under the following headings:
Basic
Accessibility
Advanced
You can open your desktop preference tools in either of the following ways:
Choose Applications->Desktop Preferences. Choose the item that you require from the submenus.
Double-click on the Start Here object on the desktop background. A Nautilus window opens at the Start Here location. Double-click on the Desktop Preferences object in the Nautilus window to display the desktop preference tools. Double-click on the item that you require.