Acer 9520, 9510 Using the keyboard, Lock keys and numeric keypad, Lock key Description, Fn + F12

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Using the keyboard

The keyboard has full-sized keys and a numeric keypad, separate cursor, lock, Windows, function and special keys.

Lock keys and numeric keypad

The keyboard has three lock keys which you can toggle on and off.

Lock key	Description
Caps Lock	When Caps Lock is on, all alphabetic characters typed are
	in uppercase.
Num Lock	When Num Lock is on, the right hand side numeric keypad is
	in numeric mode. The keys function as a calculator (complete
	with the arithmetic operators +, -, *, and /). When Num Lock
	is off, the keys assume cursor and other shortcut functions.
Scroll Lock	When Scroll Lock is on, the screen moves one line up or down
<Fn> + <F12>	when you press the up or down arrow keys respectively.
	Scroll Lock does not work with some applications.

The numeric keypad functions like a desktop numeric keypad. It is indicated by small characters located on the upper right corner of the keycaps. To simplify the keyboard legend, cursor-control key symbols are not printed on the keys.

Desired access	Num Lock on	Num Lock off
Number keys on	Type numbers in a normal
keypad	manner.
Cursor-control keys	Hold <Shift> while using	Hold <Fn> while using
on keypad	cursor-control keys.	cursor-control keys.
Main keyboard keys	Hold <Fn> while typing	Type the letters in a
	letters on keypad.	normal manner.