Using the Ambient Light Sensor | Dell UY691 instruction

3In the Display Settings window, click the monitor 2 icon, click the Extend the desktop onto this monitor check box, and then click Apply.

4Click OK to close the Display Settings window.

To disable extended desktop mode:

1In the Display Settings window, click the Settings tab.

2Click the monitor 2 icon, uncheck the Extend the desktop onto this monitor option, and then click

Apply.

Using an External Monitor as Your Primary 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), perform the steps in the following section that corresponds to the operating system your computer is using.

Microsoft® Windows® XP

1Click the Start button and click Control Panel.

2Under Pick a category, click Appearance and Themes.

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

Display.

4Click the Settings tab→Advanced→Displays tab.

Windows Vista®

1Click the Windows Vista Start button, , and click Control Panel.

2Under Appearance and Personalization, click Adjust screen resolution.

3In the Display Settings window, click the monitor 2 icon, click the This is my main monitor check box, and then click Apply.

4Click OK to close the Display Settings window.

Using the Ambient Light Sensor

The ambient light sensor is located on the front of the computer display. The sensor 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 ambient light sensor feature by pressing the <Fn> and left-arrow key combination.

NOTE: Do not cover the ambient light sensor with any adhesive labels. If covered up, the sensor—when enabled—automatically sets the display brightness to the minimum level.

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Using the Display

Image 46

Dell UY691 manual Using the Ambient Light Sensor, Click the Start button and click Control Panel

Contents

User’s Guide Abbreviations and Acronyms Contents Using the Keyboard Setting Up and Using Networks Securing Your Computer Double-Clicking the Dell Support Icon Traveling With Your Computer Adding and Replacing Parts 149 Finding Information Drivers and Utilities CD Quick Reference Guide Dell Support Website support.dell.com For more information on Dell QuickSet, see Dell To view Dell QuickSet Help, right-click the QuicksetIcon in the Microsoft Windows taskbar QuickSet on About Your Computer Front View Track stick Light is flashing Y B O a R D S T a T U S L I G H T S Left Side View D I O C O N N E C T O R S Right Side View Back View Connects serial devices, such as a mouse or handheld device About Your Computer Bottom View Transferring Information to a New Computer To prepare the new computer for the file transfer Click Finished and restart the new computer Windows Vista Using a Battery Battery Performance Microsoft Windows Power Meter Checking the Battery ChargeDell QuickSet Battery Meter Charge Gauge Low-Battery Warning Conserving Battery PowerPower Management Modes Standby Mode Hibernate Mode Charging the Battery Configuring Power Management SettingsReplacing the Battery Storing a Battery Key Combinations Using the KeyboardNumeric Keypad System Functions Display Functions BatteryPower Management Microsoft Windows Logo Key Functions Touch Pad Customizing the Touch Pad and Track Stick Changing the Track Stick CapPull the cap off the track stick Using the Keyboard Using the Keyboard Using Multimedia Playing CDs or DVDs Volume Control Window Adjusting the VolumeAdjusting the Picture Volume Control Buttons Using the Display Adjusting Brightness Microsoft Windows XP Click the Windows Vista Start button →Control Panel Microsoft Windows XP Using the Ambient Light Sensor Click the Start button and click Control Panel Ambient light sensor Using the Display Connecting a Network or Broadband Modem Cable Setting Up and Using NetworksSetting Up a Network in Microsoft Windows XP Checking Your Wireless Network Card Setting Up a Network in Microsoft Windows VistaWireless Local Area Network Wlan What You Need to Establish a Wlan Connection Setting Up and Using Networks Connecting to a Wlan Setting Up and Using Networks Mobile Broadband or Wireless Wide Area Network Wwan Checking Your Mobile Broadband Card Connecting to a Mobile Broadband Network Enabling/Disabling the Dell Mobile Broadband Network Card Internet Connection Firewall Dell Wi-Fi Catcher Network LocatorFor information about Dell QuickSet, see Dell QuickSet on Button →Help and Support Setting Up and Using Networks Card Types Using CardsInstalling a PC Card or ExpressCard Card Blanks PC Card ExpressCard Removing a Card or Blank Using Cards Smart Cards Securing Your ComputerSecurity Cable Lock About Smart Cards Passwords Installing a Smart Card Using a Primary/System Password Using an Administrator Password Using a Hard Drive Password Enabling the TPM Feature Trusted Platform Module TPM Computer Tracking Software Security Management SoftwareIf Your Computer Is Lost or Stolen Securing Your Computer Securing Your Computer Diagnostic Lights TroubleshootingDiagnostic Light Codes During Post Computer. If the computer starts When to Use the Dell Diagnostics Dell Technical Update ServiceDell Diagnostics Starting the Dell Diagnostics From Your Hard Drive Dell Diagnostics Main Menu Troubleshooting Dell Support Utility Accessing the Dell Support UtilityClicking the Dell Support Icon Drive Problems Double-Clicking the Dell Support Icon Problems writing to a CD/DVD-RW drive CD and DVD drive problemsHard drive problems Right-click Local Disk C Mail, Modem, and Internet Problems Error Messages Troubleshooting Click Start→Control Panel→Add or Remove Programs For Windows XP Ieee 1394 Device ProblemsKeyboard Problems For Windows Vista External keyboard problems Lockups and Software ProblemsUnexpected characters Computer stops responding Other software problemsComputer does not start up Program stops responding or crashes repeatedly If necessary, uninstall and then reinstall the program Memory ProblemsNetwork Problems General PC Card or ExpressCard Problems Power Problems Docking Power Considerations Ensuring Sufficient Power for Your ComputerMemory modules see Memory on Printer Problems Scanner Problems No sound from headphones Sound and Speaker ProblemsTouch Pad or Mouse Problems No sound from integrated speakers Video and Display Problems If the display is blank If the display is difficult to read If only part of the display is readable Viewing the System Setup Screens System Setup ProgramOverview Commonly Used Settings System Setup ScreensChanging the Boot Sequence Performing a One-Time Boot Changing COM Ports System Setup Program Packing the Computer Traveling With Your ComputerIdentifying Your Computer Attach a name tag or business card to the computer Travel Tips Traveling by Air Drivers Reinstalling SoftwareWhat Is a Driver? Identifying Drivers Reinstalling Drivers and Utilities 101 Restoring Your Operating System Using Microsoft Windows System Restore 103 Using the Operating System CD Ensure that Turn off System Restore is unchecked 105 106 Recommended Tools Adding and Replacing PartsBefore You Begin Turning Off Your Computer Follow the procedures in Before You Begin on 108 Hard Drive 109 Returning a Hard Drive to Dell Media BayRemoving the Device Security Screw Removing and Installing Media Bay Devices 111 Hinge Cover Keyboard 113 Keyboard Keyboard screws Memory 115 Memory module 117 Memory module Subscriber Identity Module SIM Card Wireless Cards119 Wireless Local Area Network Wlan Cards 121 Mobile Broadband or Wireless Wide Area Network Wwan Cards FCM Flash Cache Module 123 FCM card Internal Card With Bluetooth Wireless Technology 125 Coin-Cell Battery 127 128 Dell QuickSet 129 130 Specifications 131 132 PC/SC 133 Lvds 134 135 136 137 138 Obtaining Assistance Technical Support and Customer ServiceGetting Help 139 DellConnect Online Services Automated Order-Status Service Problems With Your OrderAutoTech Service 141 Before You Call 142 For customers in the United States, call 800-WWW-DELL Contacting Dell143 Visit support.dell.com Computer, Keyboard, and Display Cleaning Your ComputerAppendix Touch Pad Floppy Drive MouseCDs and DVDs FCC Class B Macrovision Product NoticeFCC Notice U.S. Only 147 148 Glossary 149 150 151 152 153 154 155 156 157 Video resolution See resolution 158