Acer Aspire 1690 manual Using the keyboard, Lock keys, Lock Key Description, Fn-F11, Fn-F12

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Using the keyboard

The keyboard has full-sized keys and an embedded keypad, separate cursor keys, two Windows keys and twelve function keys.

Lock keys

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 embedded keypad is in numeric
(Fn-F11)	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. A better solution
	would be to connect an external keypad.
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.