Aspire Digital 2920Z, 2420 manual Finding your comfort zone, Taking care of your vision

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Finding your comfort zone

Find your comfort zone by adjusting the viewing angle of the monitor, using a footrest, or raising your sitting height to achieve maximum comfort. Observe the following tips:

•refrain from staying too long in one fixed posture

•avoid slouching forward and/or leaning backward

•stand up and walk around regularly to remove the strain on your leg muscles

•take short rests to relax your neck and shoulders

•avoid tensing your muscles or shrugging your shoulders

•install the external display, keyboard and mouse properly and within comfortable reach

•if you view your monitor more than your documents, place the display at the center of your desk to minimize neck strain

Taking care of your vision

Long viewing hours, wearing incorrect glasses or contact lenses, glare, excessive room lighting, poorly focused screens, very small typefaces and low-contrast displays could stress your eyes. The following sections provide suggestions on how to reduce eyestrain.

Eyes

•Rest your eyes frequently.

•Give your eyes regular breaks by looking away from the monitor and focusing on a distant point.

•Blink frequently to keep your eyes from drying out.

Display

•Keep your display clean.

•Keep your head at a higher level than the top edge of the display so your eyes point downward when looking at the middle of the display.

•Adjust the display brightness and/or contrast to a comfortable level for enhanced text readability and graphics clarity.

•Eliminate glare and reflections by:

•placing your display in such a way that the side faces the window or any light source

•minimizing room light by using drapes, shades or blinds

•using a task light

•changing the display's viewing angle

•using a glare-reduction filter

•using a display visor, such as a piece of cardboard extended from the display's top front edge

•Avoid adjusting your display to an awkward viewing angle.

•Avoid looking at bright light sources, such as open windows, for extended periods of time.

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Contents Users Guide Aspire 2920/2920Z/2420 SeriesPage Turning the product off before cleaning Information for your safety and comfortSafety instructions Using electrical power Product servicing Guidelines for safe battery usagePotentially explosive environments Replacing the battery packMedical devices Additional safety informationTelephone line safety Operating environmentPotentially explosive environments VehiclesMercury advisory Emergency calls Disposal instructionsTips and information for comfortable use Taking care of your vision Finding your comfort zoneDeveloping good work habits Federal Communications Comission Declaration of ConformityDeclaration of Conformity Xiv Turning your computer on and off Basic care and tips for using your computerFirst things first Your guidesTaking care of your AC adapter Taking care of your computerPlease refer to Frequently asked questions on Taking care of your battery packCleaning and servicing Xviii Contents Using the keyboard Securing your computer Power management Acer eRecovery Management Empowering Technology password Acer Empowering TechnologyAcer eNet Management Empowering Technology To switch between power plans Acer ePower ManagementUsing power plans To create a new power planBattery status To delete a power planAcer eAudio Management Acer ePresentation Management Acer eDataSecurity Management for selected models Acer eLock Management Empowering Technology Acer eRecovery Management Empowering Technology Acer eSettings Management Windows Mobility Center Top view Your Acer notebook tourIcon Item Description Icon Description Closed front viewLeft view Right view Rear view Base view Specifications Wlan English Acpi Function Description IndicatorsIcon Function Description Easy-launch buttonsTouchpad Function Left button Right button 3 Main touchpad Touchpad basicsLock key Description Using the keyboardDesired access Num Lock on Num Lock off Lock keys and embedded numeric keypadKeyDescription Windows keysHotkeys US dollar sign Euro symbolSpecial keys Ejecting the optical CD or DVD drive tray Using a computer security lockAudio Adjusting the volumeAcer GridVista dual-display compatible Using the system utilitiesLaunch Manager Select Tasks & Scans Norton Internet SecurityHow do I check for viruses? English No audio is heard from the computer Frequently asked questionsNothing appears on the screen Printer does not work Want to set up my location to use the internal modemKeyboard does not respond English Before you call Requesting serviceInternational Travelers Warranty ITW Maximizing the batterys life Battery packBattery pack characteristics Installing and removing the battery pack Optimising battery life Charging the batteryChecking the battery level Situation Recommended Action Battery-low warningAcer Arcade for selected models Display Settings Finding and playing contentSettings Player controls Audio SettingsArcade controls Navigation controlsVirtual keyboard Background modeCinema Editing Pictures Slide Show settingsAlbum Editing video VideoPlaying a video file SnapshotAuthoring CD/DVDs MusicMake DVDs File type compatibility Acer Arcade Deluxe for selected models Remote control for selected models Remote functions DVDivine Starting Acer Arcade DeluxeVideoMagician DV WizardEnglish Preparing the computer Disconnecting from the desktopTaking your notebook PC with you Moving aroundWhat to take with you Taking the computer homeWhat to bring to meetings Special considerations Setting up a home officeTraveling with the computer What to bring with you Traveling internationally with the computerSecuring your computer Using a computer security lockUsing passwords Setting passwords Entering passwordsFax/data modem Expanding through optionsConnectivity options Universal Serial Bus USB Built-in network featureEjecting an ExpressCard ExpressCardInserting an ExpressCard Installing memory Password Bios utilityBoot sequence Enable disk-to-disk recoveryRegion code Country or region Using softwarePlaying DVD movies Power management Create backup Acer eRecovery ManagementRestore and recovery Burn backup discEnglish Error messages Corrective action Troubleshooting tipsError messages English Operation conditions Regulations and safety noticesFCC notice Declaration of Conformity for EU countries Modem noticesRemarque à lintention des utilisateurs canadiens List of applicable countries TBREnglish Macrovision copyright protection notice Laser compliance statementLCD pixel statement Article 3.1b EMC Article 3.1a Health and SafetyRadio device regulatory notice General European Union EUEnglish FCC RF safety requirement English LCD panel ergonomic specifications CD-ROM IndexEnglish