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Using the Display

Dell™ Latitude™ D620 User's Guide

  Adjusting Brightness

  Switching the Video Image

  Setting Display Resolution and Refresh Rate

  Dual Independent Display Mode

  Swapping Primary and Secondary Displays

  Using the Ambient Light Sensor



Adjusting Brightness

When a Dell™ computer is running on battery power, you can conserve power by setting the brightness to the lowest comfortable setting by pressing <Fn> and the up- or down-arrow key on the keyboard.

NOTE: Brightness key combinations only affect the display on your portable computer, not monitors or projectors that you attach to your portable computer or docking device. If your computer is connected to an external monitor and you try to change the brightness level, the Brightness Meter may appear, but the brightness level on the external device does not change.

You can press the following keys to adjust display brightness:


Switching the Video Image

When you start the computer with an external device (such as an external monitor or projector) attached and turned on, the image may appear on either the computer display or the external device.

Press <Fn><F8> to switch the video image between the display only, the external device only, or the display and the external device simultaneously.


Setting Display Resolution and Refresh Rate

To display a program at a specific resolution, both the graphics card and the display must support the program, and the necessary video drivers must be installed.

Before you change any of the default display settings, make a note of the default settings for future reference.

NOTE: Use only the Dell-installed video drivers, which are designed to offer the best performance with your Dell-installed operating system.

If you choose a resolution or color palette that is higher than the display supports, the settings adjust automatically to the closest supported values.

  1. Click the Start button and click Control Panel.

  2. Under Pick a category, click Appearance and Themes.

  3. Under Pick a task..., click the area you want to change, or under or pick a Control Panel icon, click Display.

  4. In the Display Properties window, click the Settings tab.

  5. Try different settings for Color quality and Screen resolution.

NOTE: As the resolution increases, icons and text appear smaller on the screen.

If the video resolution setting is higher than that supported by the display, the computer enters pan mode. In pan mode, the entire screen cannot be displayed at one time. For example, the taskbar that usually appears at the bottom of the desktop may no longer be visible. To view the rest of the screen, use the touch pad or track stick to pan up, down, left, and right.

NOTICE: You can damage an external monitor by using an unsupported refresh rate. Before adjusting the refresh rate on an external monitor, see the user's guide for the monitor.

Dual Independent Display Mode

You can attach an external monitor or projector to your computer and use it as an extension of your display (known as "dual independent display" or "extended desktop" mode). This mode allows you to use both screens independently and drag objects from one screen to the other, effectively doubling the amount of viewable work space.

  1. Connect the external monitor, TV, or projector to the computer.

  2. Under Pick a category, click Appearance and Themes.

  3. Under Pick a task..., click the area you want to change, or under or pick a Control Panel icon, click Display.

  4. In the Display Properties window, click the Settings tab.

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.
  1. Click the monitor 2 icon, click the Extend my Windows desktop onto this monitor check box, and then click Apply.

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

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

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

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

  6. Click OK to close the Display Properties window.

To disable dual independent display mode:

  1. Click the Settings tab in the Display Properties window.

  2. Click the monitor 2 icon, uncheck the Extend my Windows desktop onto this monitor option, and then 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 the Start button and click Control Panel.

  2. Under Pick a category, click Appearance and Themes.

  3. Under Pick a task..., click the area you want to change, or under or pick a Control Panel icon, click Display.

  4. Click the Settings tab® Advanced® Displays tab.

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.

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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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