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Keyboard

The keyboard is a compact, low-profile design with a row of function keys and cursor motion keys in an inverted-T configuration. A media eject key is located to the right of the function keys.

Access to internal components and expansion connectors is no longer via the keyboard; access is via the RAM expansion slot and is explained in “The RAM Expansion Slot”.

In this section:

Keyboard Illustrations
Changing the Operation of the Keyboard

Keyboard Illustrations

Figure 3-5 shows a diagram of the keyboard. Figure 3-6 shows the alternate modes of operation of the function and control keys. Figure 3-7 shows the embedded numeric keypad.


Figure 3-5 Keyboard layout

Figure 3-5 Keyboard layout

Figure 3-6 and Figure 3-7 include duplicate versions of some keys in order to show their alternate modes of operation. In some cases, the alternate key captions shown in the figures do not appear on the keyboard. For a diagram of the keyboard, refer to Figure 3-5.


Figure 3-6 Alternate operations of function and control keys

Figure 3-6 Alternate operations of function and control keys

Figure 3-7 Embedded numeric keypad operation

Figure 3-7 Embedded numeric keypad operation


Changing the Operation of the Keyboard

Several of the keys on the keyboard have more than one mode of operation.

Table 3-8 The default function keys as control buttons

Key name

Control button

F1

Decrease display brightness

F2

Increase display brightness

F3

Mute the speaker

F4

Decrease speaker volume

F5

Increase speaker volume

F6

Num Lock

F7

Display mode toggle


Table 3-8 defines the default operation of the function keys. The "Use the F1-F12 keys for custom actions" checkbox in the Keyboard and Mouse pane in System Preferences allows you to toggle the default operation of these keys to custom actions. When this checkbox is enabled, the function keys operate as F1 through F12 keys that can be customized within individual software applications. Holding down the fn key while the checkbox is enabled, will go back to perform the default action that is listed in Table 3-8.

The next sections describe these groups of keys and the way their alternate modes of operation are selected by using the Fn key and the Num Lock key.


Using the Fn Key

Pressing the Fn key affects these keys: the function keys F1– F7, the embedded numeric keypad, certain modifier keys, and the delete key.

Note: User-programmable function key assignments were supported in Mac OS 9. In Mac OS X, the user must provide a third-party utility to enable the feature.

Using the Num Lock Key

Pressing the Num Lock key affects two sets of keys: the embedded keypad and the rest of the alphanumeric keys.


The Embedded Keypad

A certain group of alphanumeric keys can also function as an embedded keypad. The user selects this mode by using the Fn key or the Num Lock key. Figure 3-7 shows the keys making up the embedded keypad and Table 3-9 lists them.

Table 3-9 Embedded keypad keys

Key name

Keypad function

6

Clear

7

7

8

8

9

9

0

/ (divide)

-

= (equals)

U

4

I

5

O

6

P

* (multiply)

J

1

K

2

L

3

;

– (subtract)

M

0

,

NOP

.

. (decimal)

/

+ (add)


When the embedded keypad is made active by the Num Lock key, the other alphanumeric keys have no operation (NOP), as shown in Figure 3-7. The affected keys include certain special character keys: plus and equal sign, right and left brackets, vertical bar and backslash, and straight apostrophe.


Other Control Keys

The cursor control keys can also be used as page control keys. Other control keys can take on the functions of certain keys on a PC keyboard, for use with PC emulation software. The Fn key controls the modes of operation of this group of keys. Table 3-10 is a list of these keys and their alternate functions. These control keys are also show in Figure 3-7.

Table 3-10 Control keys that change

Key name

Alternate function

Shift

Right shift key

Control

Right control key

Option

Alt gr (right Alt key)

Command

Windows¨ key

Enter

Menu key (for contextual menus)

Left arrow

Home

Up arrow

Page up

Down arrow

Page down

Right arrow

End




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Last updated: 2004-04-19

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