Fujitsu CELSIUS H7510 Operating Manual page 25

Working with the notebook
Indicator Description
Scroll Lock indicator
Indicator ScrollLock
Indicator is illuminated: the key combination Fn + Scr has been pressed. The
effect that this key has varies between applications.
F-Lock indicator
F
Anzeige FLock
F
The indicator lights up: The key combination Fn + was pressed. Instead
of the imprinted standard functions of the function keys, the Fn functions can
be executed by pressing the keys directly (see chapter "Function keys and key
combinations", Page 25).
Fujitsu 21