2.Click Start® Control Panel® Display® Settings.

NOTE: If you choose a resolution or color palette that is higher than the display supports, the settings adjust automatically to the closest supported values. For more information, see your operating system documentation.

3.Click the monitor 2 icon® Extend my Windows desktop onto this monitor® Apply.

4.Change Screen resolution to the appropriate sizes for both displays and click Apply.

5.If prompted to restart the computer, click Apply the new color setting without restarting® OK.

6.If prompted, click OK to resize your desktop.

7.If prompted, click Yes to keep the settings.

8.Click OK to close the Display Properties window.

To disable dual independent display mode:

1.Click Settings in the Display Properties window.

2.Click the monitor 2 icon, uncheck the Extend my Windows desktop onto this monitor option, and click Apply.

If necessary, press <Fn><F8> to bring the screen image back to the computer display.

Swapping Primary and Secondary Displays

To swap your primary and secondary display designations (for example, to use your external monitor as your primary display after docking):

1.Click Start® Control Panel® Display® Settings® Advanced® Displays.

See the documentation that came with your video card for additional information.

Using the Ambient Light Sensor

The ambient light sensor (ALS) is located on the bottom of the computer display panel. The ALS detects available environmental light and automatically increases or decreases the display backlighting to compensate for low-light and high-light environments.

You can enable or disable the ALS feature by pressing the <Fn> and left-arrow key combination.

NOTE: Do not cover the ALS with any adhesive labels. If covered up, the ALS automatically sets the display brightness to the minimum level.

1

ambient light sensor

The ALS is disabled when your computer is shipped to you. If you enable the ALS and then use any of the display brightness key combinations, the ALS is disabled and the display brightness is increased or decreased accordingly.

Dell™ QuickSet allows you to enable or disable the ALS feature. You can also adjust maximum and minimum brightness settings that are activated when you

enable the ALS feature. For more information about QuickSet, right-click the icon in the taskbar, and click Help.

NOTE: Rebooting the computer returns the ambient light sensor to the last setting of enabled or disabled.

NOTE: The ambient light sensor adjusts the display backlighting on your portable computer only. It does not control the brightness on any external monitors or projectors.

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Dell PP04X specifications Swapping Primary and Secondary Displays, Using the Ambient Light Sensor
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PP04X specifications

The Dell PP04X, commonly known as the Dell Latitude E6420, is a versatile and robust laptop that is designed for business professionals and power users alike. It combines performance, durability, and a wide array of connectivity options, making it a popular choice in the corporate world.

One of the standout features of the PP04X is its solid build quality. The laptop is constructed with a premium aluminum chassis paired with a magnesium alloy frame, ensuring it can withstand the rigors of daily use. The spill-resistant keyboard provides an added layer of protection against accidental spills, making this device a reliable option for users on the go.

The Dell PP04X is powered by Intel's second-generation Core processors, providing excellent performance for multitasking and demanding applications. With options ranging from Core i3 to Core i7, users can select the level of power they need for their specific tasks. The laptop supports up to 8GB of DDR3 RAM, which contributes to its ability to handle multiple applications simultaneously without compromising speed.

In terms of storage, the Latitude E6420 offers various configurations, including traditional hard drives (HDD) and solid-state drives (SSD), allowing users to balance performance and storage capacity based on their requirements. The inclusion of SSD options results in faster boot times and quicker file access, greatly enhancing overall productivity.

The display of the Dell PP04X is another highlight. It features a 14-inch HD screen with anti-glare technology, making it suitable for use in various lighting conditions, whether in a brightly lit office or while traveling. The high-resolution screen ensures crisp visuals, ideal for presentations and detailed graphic work.

Connectivity options on the Latitude E6420 are plentiful, featuring multiple USB ports, an HDMI output, and an ExpressCard slot for expandability. Additionally, users can opt for built-in mobile broadband capabilities to stay connected on the move.

Dell also places a strong emphasis on security in the PP04X. The laptop includes features such as a fingerprint reader, smart card reader, and optional TPM (Trusted Platform Module) for enhanced security, ensuring that sensitive information remains protected.

Overall, the Dell PP04X Latitude E6420 is an excellent choice for business users who require a durable and powerful laptop. With its blend of performance, security features, and connectivity options, it is well-suited to meet the demands of a fast-paced work environment. Whether for office use or travel, the PP04X provides a reliable and efficient computing experience.
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