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9.26. Universal AccessThe Universal Access panel is designed for people who type with one hand, find it difficult to use a mouse, or have trouble seeing or hearing. (These features can also be handy when the mouse is broken or missing.) 9.26.1. Seeing Tab (Magnifying the Screen)If you have trouble seeing the screen, then boy, does Mac OS X have features for you (Figure 9-15). 9.26.1.1. VoiceOverOne option is an all-new feature called VoiceOver, which makes the Mac read out loud every bit of text that's on the screen. VoiceOver is described on Section 15.5.1.1. 9.26.1.2. Magnify the screenAnother quick solution is to reduce your monitor's resolution thus magnifying the imageusing the Displays panel described earlier in this chapter. If you have a 17-inch or larger monitor set to, say, 640 x 480, the result is a greatly magnified picture. That method doesn't give you much flexibility, however, and it's something of a hassle to adjust. If you agree, then try the Zoom feature that appears here; it lets you enlarge the area surrounding your cursor in any increment. To make it work, press Option- -8 as you're working. Or, if the Seeing panel is open , click On in the Zoom section. That's the master switch. No zooming actually takes place, however, until you press Option- -plus sign (to zoom in) or Option- -minus sign (to zoom out). With each press, the entire screen image gets larger or smaller, creating a virtual monitor that follows your cursor around the screen. If you click Options, you'll find miles and miles of options that control when the enlarged screen image pans (all the time, or only when the pointer hits a screen edge), the maximum or minimum degree of enlargement , and so on.
9.26.1.3. Inverted colorsWhile you're at it, pressing Control-Option- -* (asterisk), or clicking the "Switch to Black on White" button, inverts the colors of the screen, so that text appears white on blackan effect that some people find easier to read. (This option also freaks out many Mac fans who turn it on by mistake, somehow pressing Control-Option- -* by accident during everyday work. They think that the Mac's expensive monitor has just gone loco. Now you know better.) Tip: There's also a button called Use Grayscale, which banishes all color from your screen. This is another feature designed to improve text clarity, but it's also a dandy way to see how a color document will look when printed on a monochrome laser printer. No matter which color mode you choose, the "Enhance contrast" slider is another option that can help. It makes blacks blacker and whites whiter, further eliminating in-between shades and thereby making the screen easier to see. (If the Universal Access panel doesn't happen to be open, you can always use the keystrokes Control-Option- -< and -> to decrease or increase contrast.) 9.26.2. Hearing Tab (Flashing the Screen)If you have trouble hearing the Mac's sounds, the obvious solution is to increase the volume, which is why this panel offers a direct link to the Sound preferences pane. (If your Mac doesn't have external speakers , consider getting some.) Fortunately, hearing your computer usually isn't critical (except when working in music and audio, of course). The only time audio is especially important is when the Mac tries to get your attention by beeping. For those situations, turn on "Flash the screen when an alert sound occurs" (an effect you can try out by clicking the Flash Screen button). Now you'll see a white flash across the entire monitor whenever the Mac would otherwise beepnot a bad idea on laptops, actually, so that you don't miss beeps when you've got the speakers muted. 9.26.3. Keyboard Tab (Typing Assistance)This panel offers two clever features designed to help people who have trouble using the keyboard.
9.26.4. Mouse & Trackpad Tab (Cursor Control from the Keyboard)Mouse Keys is designed to help people who can't use the mouseor who want more precision when working in graphics programs. It lets you click, drag, and otherwise manipulate the cursor by pressing the keys on your numeric keypad. When Mouse Keys is turned on, the 5 key acts as the clickerhold it down for a moment to "click the mouse," do that twice to double-click, and so on. Hold down the 0 key to lock down the mouse button, and the period key to unlock it. (The amount of time you have to hold them down depends on how you've set the Initial Delay slider.) Move the cursor around the screen by pressing the eight keys that surround the 5 key. (For example, hold down the 9 key to move the cursor diagonally up and to the right.) If you hold one of these keys down continuously, the cursor, after a pause, begins to move smoothly in that directionaccording to the way you have adjusted the sliders called Initial Delay and Maximum Speed. Tip: The checkbox called "Press the Option key five times to turn Mouse Keys on or off" saves you the trouble of opening System Preferences. |
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