Dell Inspiron 20 (3048, Early 2014) - Manual (Page 27)

Keyboard
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• Navigation keys for moving the cursor around in documents or
windows: , , , , ,
, and arrow keys
Physical Keyboard
Physical keyboards are used with laptop and desktop computers.
Laptops generally have a built-in keyboard. External keyboards are generally
used with desktop computers. Some keyboards may have features such
as keys for volume adjustment, application shortcuts, built-in touchpad,
programmable shortcut keys, backlight, and so on.
Keyboard Backlight
The backlight present on some physical keyboards illuminates the symbols
on the keys to allow for using the keyboard in dark environments. You
can turn on the backlight manually or configure the backlight to turn on
automatically when your computer is placed in a dark environment.