This chapter explains how you can control your computer using VoiceOver gestures on a Multi-Touch trackpad.
If you have a Multi-Touch trackpad and VoiceOver is turned on, you can use gestures to navigate and interact with items on the screen, and enter VoiceOver commands.
To use VoiceOver gestures, you enable the Trackpad Commander by holding down the Control and Option keys (called the “VO keys”) while rotating two fingers clockwise on the trackpad, or by selecting the option in VoiceOver Utility. Once enabled, you can use a set of standard VoiceOver gestures, and you can customize other gestures by assigning VoiceOver commands to them.
VoiceOver gestures involve using one or more fingers to drag, tap, flick, or rotate on the trackpad. You can use different techniques for a gesture. For example, you can tap using two fingers from one hand, or one finger from each hand. Try different techniques to discover which one works best for you. You can use keyboard help to practice standard and customized gestures and learn what they do.
VoiceOver speaks the items in the VoiceOver cursor as you move the cursor, and plays a sound effect whenever it encounters a blank space on the screen. This information helps you gain a sense of the actual location of items on the screen as you navigate.
When you touch the trackpad, it’s as if you’re touching a portion of the screen. The trackpad represents the window or area on the screen where the VoiceOver cursor is located. When you drag a finger on the trackpad, you move the VoiceOver cursor only in that window or area. For example, if the cursor is in the Mail toolbar, the trackpad represents the Mail toolbar. When you drag your finger on the trackpad, you move the VoiceOver cursor in the Mail toolbar. Because the trackpad represents only a specific area and not the entire screen, you can’t stray to other areas or applications by accident.
To enhance collaboration with sighted users, VoiceOver makes the area of the screen you’re working in more visible by dimming the rest of the screen. You can adjust the transparency of this effect using the Touch pane in VoiceOver utility. Other collaboration features, such as the caption or braille panels, can also be used at the same time as VoiceOver gestures.
To disable the Trackpad Commander and stop using VoiceOver gestures, hold down the Control and Option keys while rotating two fingers counterclockwise on the trackpad, or select the option in VoiceOver Utility.
If you’re using a Multi-Touch trackpad, you can enable the Trackpad Commander to start using standard VoiceOver gestures to navigate and interact with items on the screen.
Note:When you’re using VoiceOver gestures, you can’t use the mouse button on the trackpad, unless the mouse button is used with a modifier key, as in Control-click.
Hold down the Control and Option keys (the “VO keys”) and rotate two fingers clockwise anywhere on the trackpad.
To use VoiceOver gestures:
Hold down the Control and Option keys (the “VO keys”) and rotate two fingers counterclockwise anywhere on the trackpad.
You can use both VoiceOver gestures and keyboard shortcuts to enter VoiceOver commands.
If you have enabled the Trackpad Commander to use VoiceOver gestures, you can assign VoiceOver commands to some gestures.
Note:VoiceOver includes a set of standard VoiceOver gestures, which you can’t change.
Unlike standard VoiceOver gestures, you must hold down a modifier key to use customized gestures.
You can use the Custom Commands menu to assign scripts and Automator workflows to gestures. For example, you could run a script (such as a Perl, Ruby, Python, or AppleScript script) when you use the gesture Command-Two-finger Double-tap.
If you’re using VoiceOver gestures, the rotor is like a virtual dial you turn to access various ways to navigate, based on the current context. For example, when you’re browsing a webpage, use settings such as tables, web spots, or images. In other contexts, use settings such as navigation, words, characters, or adjust.
As you “turn” the rotor, VoiceOver speaks each setting and plays a clicking sound. If you miss a setting, keep turning the rotor until you hear the setting again.
For example, if the current setting is Word, then when you flick down on the trackpad, the VoiceOver cursor moves to the next word. Keep flicking down to move forward word by word. If you repeatedly flick up on the trackpad, the VoiceOver cursor moves backwards word by word.
Here are the settings you can use:
Web settings: Headers, Images, Frames, Tables, Non-Visited Links, Visited Links, Web Spots, Form Controls, Auto Web Spots, Links
Other settings: Character, Word, Navigation, Adjust
The Character and Word settings are most useful when interacting with a text area, to read the text by character or by word. Use the Adjust setting to increase or decrease the values in a slider, stepper, splitter, or other similar control.
The Navigation setting navigates text line by line. When you’re interacting with a text area, VoiceOver begins speaking the first line at the point where the cursor was located when you first flicked up or down; it speaks each subsequent line in its entirety.
When you use the Navigation setting in a window or dialog, VoiceOver might not speak all of the items on a line, depending on how the items are arranged. You may need to flick left or right and then flick up or down again to hear other items.
The current web navigation mode affects how you navigate webpages using the rotor. In DOM mode, flicking up or down on the trackpad moves to the previous or next instance of the item that matches the current rotor setting. For example, if the rotor is set to headers, flicking up or down moves to the previous or next header. In grouping related items mode, flicking up or down moves to the previous or next group of related items. You can assign the “Toggle Web Navigation DOM or Group” command to a gesture using the Trackpad Commander, to easily switch modes to suit your needs.