Apple VoiceOver Manuel de démarrage rapide télécharger pdf (Page 18)

18 Chapter 3 Keyboard Basics

Using Function Keys on Portable Computers

On a portable computer, many of the function keys are programmed to perform

hardware-related functions such as adjusting brightness and volume. When you want

to perform an alternate action for the key, you press the Fn key and the function key

together. For example, in VoiceOver you press the following key combination to open

VoiceOver Utility:

Control-Option-F8

If you use a portable computer, you must press the function key with the command

Fn-Control-Option-F8

If you use VoiceOver all the time or very frequently, you can change the default

behavior of the function keys so that they perform software actions. Then the portable

keyboard behaves like a standard keyboard, and you press the Fn key only to change

the volume or change any of the other hardware settings.

To change the default behavior of the function keys:

1 Click the System Preferences icon in the Dock or choose Apple menu > System

Preferences to open System Preferences.

2 Click the Keyboard & Mouse button.

3 Click the Keyboard tab.

4 Select the checkbox labeled “Use the F1-F12 keys to control software features.”

When this checkbox is selected, you press the Fn key when you want to use the

hardware function of the key, such as adjusting volume. When you use the keys for

VoiceOver commands, you don’t need to press the Fn key with the VoiceOver

commands that use function keys.

Using Home, End, Page Up, and Page Down on Portable Computers

A standard keyboard has dedicated keys for Home, End, Page Up, and Page Down.

These are important VoiceOver navigation keys. On a portable computer, you use the

arrow keys with the Fn key for these functions.

Keyboard Accessibility

If you are able to use a keyboard but find it difficult, some other features included in

Mac OS X may help you use your keyboard more effectively with VoiceOver.

Sticky Keys

The Sticky Keys feature treats a series of modifier key presses as a single key

combination. For example, you can press Control, and then Option, and your keyboard

interprets that combination as Control-Option held down together.

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Apple VoiceOver Manuel de démarrage rapide Page 18