Visual QuickStart Guide [Electronic resources] : Mac OS X 10.4 Tiger نسخه متنی

1.

Display any pane of the Universal Access Preferences pane (Figure 117, 119, 120 , or

122 ).

2.

Turn on the Enable access for assistive devices check box.

1.

In the Universal Access preferences pane, click the Seeing button (Figure 117 ).

2.

Set options as desired:

VoiceOver enables you to turn Mac OS X's new VoiceOver feature on or off. I tell you about VoiceOver in

Chapter 22 .

Zoom enlarges the part of the screen you are pointing to when you press the zoom in key combination: .

Display enables you to set black on white or white on black (Figure 118 ) screen display or convert color to grayscale. You can drag a slider in this area to enhance or reduce contrast.

Figure 118. As odd as it may seem, some people find this image easier to see than the standard black on white image.




[View full size image]

1.

In the Universal Access preferences pane, click the Hearing button (Figure 93 ), which I discuss earlier in this chapter, to adjust the volume.

1.

In the Universal Access preferences pane, click the Keyboard button (Figure 120 ).

2.

To enable Sticky Keys, select the On radio button beside Sticky Keys. Then set options as desired:

Press the Shift key five times to turn Sticky Keys on or off enables you to toggle Sticky Keys by pressing five times.

Beep when a modifier key is set plays a sound when a modifier key you press is recognized by the system.

Display pressed keys on screen shows the image of the modifier key on screen when it is recognized by the system (Figure 121 ).

Figure 121. Universal Access can show you which keys you pressedin this example, and .

3.

To enable Slow Keys, select the On radio button beside Slow Keys. Then set options as desired:

Use click key sounds plays a sound when a key press is accepted.

Acceptance delay enables you to adjust the amount of time between the point when a key is first pressed and when the keypress is accepted.

1.

In the Universal Access preferences pane, click the Mouse button (Figure 120 ).

2.

To enable Mouse Keys, select the On radio button. Then set options as desired:

Press the option key five times to turn Mouse Keys on or off enables you to toggle Mouse Keys by pressing five times.

Initial Delay determines how long you must hold down the key before the mouse pointer moves.

Maximum Speed determines how fast the mouse pointer moves.

3.

To make the mouse easier to see, drag the Cursor Size slider to the right. The mouse pointer gets bigger.