"Auto-scrolling is a feature that can be found in most mainstream modern applications. Pressing the middle mouse button transfers the application into the auto-scrolling mode. In this mode, moving the mouse down starts scrolling down the contents even when the mouse is no longer moving. The scroll speed depends on the distance between the current mouse location and the mouse press location. This works for all four directions (up, down, left, right)."
Advantages: * Configurable-TouchPad devices can be custom designed to meet your requirements for size, thickness, buttons, and software features. * Advanced Features-TouchPad includes patented, advanced features, such as HandCheck, Virtual Scrolling, Tap Zones, and Edge Motion. * High Tolerance to User Abuse-TouchPad is resistant to moisture, dirt, and surface scratches. * Reliability-With no moving parts to wear out over time, Touchpad devices have a related life of over 1 million taps. * Accuracy-Resolution of 1000 DPI results in a precise and responsive touching sensing. * Easy to Use-Requires only a slight touch to activate, no pressure is necessary. * The pad's position is fixed relative to the keyboard, and very short finger movements are required to move the cursor across the display screen. Â· No additional mouse needs to be carried along with the laptop everytime Â· Hand movements are reduced to smaller finger movements. Â· Nice tricks like auto scroll on the side. Disadvantages: Â· Only available on laptops. Â· Smaller surface to move on. Â· Activates when ur busy reading something on autoscroll and rest ur hand on it. Â· Left and right keys are more difficult to use that in regular usb mouse. Â· Cannot scroll across the screen in one go (unless the touchpad is made very sensitive by altering settings). By Mohammed Arif