HP EliteBook 840 G3 - Manual (Page 23)

Component Description
(1) esc key Displays system information when pressed in combination with
the fn key.
(2) fn key Executes frequently used system functions when pressed in
combination with a function key, the num lock key, the esc key,
or the b key.
(3) Windows key Returns you to the Start screen from an open app or the
Windows desktop.
NOTE: Pressing the Windows key again will return you to the
previous screen.
(4) Function keys Execute frequently used system functions when pressed in
combination with the fn key.
(5) num lock key Alternates between the navigational and numeric functions on
the integrated numeric keypad.
(6) Integrated numeric keypad When num lock has been enabled, it can be used like an external
numeric keypad.
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