1258 Accessibility Chapter 24 Today s computer tools, including
1258 Accessibility Chapter 24 Today s computer tools, including most mice, are designed almost exclusively for right-handed users. Microsoft recognized this problem and added the Mouse Button Settings window (Fig. 24.35) to the Accessibility Wizard. This tool allows the user to create a virtual left-handed mouse by swapping the button functions. Click Next. Users can adjust mouse speed through the MouseSpeed (Fig. 24.36) section of the Accessibility Wizard. Dragging the scroll bar changes the speed. Clicking the Next button sets the speed and displays the wizard s Set Automatic Timeouts window (Fig. 24.37). Although accessibility tools are important to users with disabilities, they can be a hindrance to users who do not need them. In situations where varying accessibility needs exist, it is important that the user be able to turn the accessibility tools on and off as necessary. The Set Automatic Timeouts window specifies a timeout period for enabling or disabling accessibility tools. A timeout either enables or disables a certain action after the computer has idled for a specified amount of time. A screen saver is a common example of a program with a timeout period. Here, a timeout is set to toggle the accessibility tools. After the user clicks Next, the Save Settings to File dialog appears (Fig. 24.38). This dialog determines whether the accessibility settings should be used as the default settings, which are loaded when the computer is rebooted or after a timeout. Set the accessibility settings as the default if the majority of users needs them. Users also can save multiple accessibility settings. The user can create an.acwfile, which, when chosen, activates the saved accessibility settings on any Windows 2000 computer. 24.15.4 Microsoft Narrator Microsoft Narrator is a text-to-speech program designed for people with visual impairments. It reads text, describes the current desktop environment and alerts the user when certain Windows events occur. Narrator is intended to aid in the configuration of Microsoft Windows. It is a screen reader that works with Internet Explorer, Wordpad, Notepad and most programs in the Control Panel. Although its capabilities are limited outside these applications, Narrator is excellent at navigating the Windows environment. Fig. 24.35 Fig. 24.35Fig. 24.FF35ig. 24.35ig. 24.35Mouse Button Settings window.
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