A+ Essentials Tutorial

2.0 Laptop and Portable Devices

2.1 Identify the fundamental principles of using laptops and portable devices

  • Input devices (e.g. stylus / digitizer, function (Fn) keys and pointing devices such as touch pad, point stick / track point)

Function (Fn) keys:

Fn key is commonly found in notebook computers. The primary reason for providing an Fn key in notebooks is to ensure a compact keyboard. Fn is a modifier key on notebook keyboards and used to combine keys which are otherwise kept separate.

Unlike other modifier keys such as Shift , the control circuit inside the keyboard sends out a different key code depending on whether the Fn key is depressed. This allows the compact keyboard to provide functionality of a full sized keyboard.

The Fn key combinations may also be mapped to control system interfaces to change the LCD brightness and contrast, display output, eject a CD, or adjust speaker volume on laptop computers.


Touchpad is an input device widely used in laptop computers. It is used to position or move the the curser according to the finger movement on the touchpad. A touchpad is similar to that of a mouse on a desktop computer. A typical touchpad is shown below:

aplus tutorial images

When you move your finger on the touchpad, the pointer (arrow) on the screen moves in the same direction.

The touchpad (A) also has a right button (B) and a left button (C). Use the left and right buttons below the touchpad to select objects, cut, paste, or drag objects.


Stylus is a pointing and drawing device shaped like a pen, and used with with a digitizing tablet or touch screen. The stylus point is made of a non scratching

aplus tutorial images

plastic to "write" on Personal Digital Assitants (PDAs) or any similar device screen.

A Dell Axim stylus pen is shown in the figure above.

Contents (Top)      Previous      Next

Disclaimer: All Simulation Exams practice tests, study guides and/or material are neither sponsored by, nor endorsed by, nor affiliated with CompTIA® or any other company. All trademarks are trademarks of their respective owners and duly  acknowledged. A+™, Network+™, i-Net+™, Server+™,Security+™ are registered trade marks of CompTIA®. The practice tests material is a copyright of SimulationExams.com and the same is not approved or endorsed by respective certifying bodies. Thank-you for your interest in Simulation Exams. Please see read me file before you download, install, and/or use any software from SimulationExams.com For any information or questions regarding this Website, please e-mail webmaster at simulationexams.com