Acer 7520G, 7220 Using the keyboard, Lock keys and separate numeric keypad, Lock key Description

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Using the keyboard

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

Lock keys and separate numeric keypad

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

English

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 separate keypad is in numeric mode. The
	keys function as a calculator (complete with the arithmetic operators
	+, -, *, and /). Use this mode when you need to do a lot of numeric
	data entry.
Scroll Lock	When Scroll Lock is on, the screen moves one line up or down when
<Fn> + <F12>	you press the up or down arrow keys respectively. Scroll Lock does not
	work with some applications.