If you want to gain just a little more screen real estate when using
your applications, you can configure Windows XP to automatically hide
the taskbar until you need it. With the Auto-hide option selected, the
Windows taskbar will disappear when it is not required and the
application you have open should expand to fill all the available screen
space.
Moving the mouse cursor to the bottom of the screen will cause the taskbar to reappear when you need to access it.Here's how to turn on the Auto-hide option:
1. Right-click on the taskbar and select "Properties" from the context menu. The "Taskbar and Start menu Properties" window should open.
2. With the "Taskbar" tab open, put a check in the box labelled "Auto-hide the taskbar".
3. Also make sure there is a check in the box labelled "Keep the taskbar on top of other windows".
4. Click "OK" to save the changes and exit the properties window.
The Taskbar should now disappear. To make the taskbar visible, simply move your mouse cursor right to the bottom of the screen.
Note : To make the auto hide of Task bar off. Again unchek the Auto hide the task bar in Task Bar adn Start menu properties.
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