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), you can select which 61 nNdisplay is used as the primary monitor. If you want to work on the computer display and the external display at the same time, see Using the Dual Display function (page 62) for more information. To change the primary monitor, proceed as follows: 1 Click the Start button, and then Control Panel. The Control Panel appears. 2 Click Appearance and Themes. 3 Click Display. The Display Properties dialog box appears. 4 Click the Settings tab. 5 Click the display marked 2. By default, your computer LCD screen is the display marked 1. If you do not know whether your computer screen or the external screen is 1 or 2, click the Identify button. 6 Select the Use this device as the primary monitor check box. 7 Click Apply and then OK. The external display is now the primary monitor. Hardware Guide Connecting peripheral Using the Dual Display function The dual display function allows you to distribute portions of your desktop across separate displays. For 62 nNexample, if you have an external monitor attached to the monitor connector, your LCD display and the monitor can function as a single desktop. You can move the cursor from one display to the other. This allows you to drag objects, such as an open application window or a toolbar, from one display to the other. This configuration of a single desktop distributed across separate displays, is referred to as a virtual desktop. . Your monitor or TV hardware may not support the Dual Display function. Certain software applications may not be compatible with Dual Display settings. Make sure that your computer does not enter Standby or Hibernate mode while you are using Dual Display mode, otherwise your computer may not return to Normal mode. If you set different colours on each display, do not divide one single window on two displays, otherwise your software may not work properly. Set fewer colours or a lower resolution for each display. Connecting peripheral Selecting the Dual Display mode To select the Dual Display mode, proceed as follows: 1 Click the Start button on the Windows taskbar. 2 Click Control Panel. 3 Click Appearance and Themes. 4 Click the Display icon. 5 Select the Settings tab. 6 Click the display marked 2. 7 Select the Extend my Windows desktop onto this monitor check box. 8 Click Apply and then OK. . Your monitor or TV hardware may not support the Dual Display function. Setting the colours and resolution for each display You can set the display colours and resolution for each display that is part of a virtual desktop. To set the display colours and resolution for each display, proceed as follows: 1 Click the Start button on the Windows taskbar. 2 Click Control Panel. 3 Click Appearance and Themes. 4 Click the Display icon. 5 Select the Settings tab. 6 Click the display you want to change (1 or 2) : display colours or resolution. 7 Select an option from the Color quality list to change colours. 8 Use the slider in the Screen resolution to adjust the resolution. 9 Click Apply and then OK. 63 nN Hardware Guide Hardware Guide Connecting peripheral Customizing the virtual desktop You can customize the Dual Display mode by changing the position of the two monitors comprising the 64 nNvirtual desktop. To customize Dual Display mode, proceed as follows: 1 Click the Start button on the Windows taskbar. 2 Click Control Panel. 3 Click Appearance and Themes. 4 Click the Display icon. 5 Click the Settings tab. 6 Drag the monitor icons to match the physical arrangement of your monitors. The two monitor icons must be connected to create a virtual desktop. 7 Click Apply and then OK. Deactivating the Dual Display function To deactivate the Dual Display function, proceed as follows: 1 Click the Start button on the Windows taskbar. 2 Click Control Panel. 3 Click Appearance and Themes. 4 Click the Display icon. 5 Click the Settings tab. 6 Click the display 2. 7 Deselect the Extend my Windows desktop onto this monitor option. This will disable the Dual Display. . For switching from Primary to Secondary display, see the section Selecting display modes ( page 61) . Hardware Guide Connecting peripheral Connecting external speakers You can enhance the sound quality of your computer by connecting external speakers. To connect external speakers, proceed as follows: 1 Plug the speaker cable (1) into the headphone connector (2) . 65 nN 2 Plug the other end of the speaker cable into the external speaker ( 3) . 3 Turn down the volume of the speakers before you turn them on. . Make sure your speakers are designed for computer use. Do not place floppy disks on the speakers; their magnetic field may damage the data on the disks. Troubleshooting sound My speakers are not producing sound . If you use external speakers, check that the speakers are properly connected and the volume is turned up. If the speakers have a mute button, make sure it is off. If the battery powers the speakers, check that the battery is inserted properly and that it is charged. . If you ha...