Apple 17-INCH Using the Fn Key, Using the Num Lock Key, Function Keys, Key name Control button

CHAPTER 3

Devices and Ports

Using the Fn Key

Pressing the Fn key affects three sets of keys: the function keys F1–F12, the embedded numeric keypad, and certain modifier keys.

●It toggles the function keys between their control-button operation and their F1–F10 functions, as shown in Table 3-9(page 42) and Figure 3-7(page 40).

●It selects the embedded numeric keypad on the right portion of the alphanumeric keys, as shown in Table 3-10(page 43) and Figure 3-8(page 41).

●It changes certain control keys, including the cursor control keys, to page control keys, as shown in Table 3-11(page 43) and Figure 3-8(page 41).

Note: In Mac OS X, a third-party utility is needed to implement user-programmable function key assignments.

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.

●It selects the embedded numeric keypad, as shown in Table 3-10(page 43) and Figure 3-8(page 41).

●It makes the rest of the alphanumeric keys functionless (NOPs), as shown in Figure 3-8(page 41).

The Function Keys

Table 3-9(page 42) defines the operation of the function keys.

Table 3-9	The 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	Switch between dual display and mirroring modes
F8	Keyboard illumination control
F9	Decrease keyboard illumination

42Keyboard

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