Sony PCG-FX390P - Manual (Page 14)

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14
Indicator lights
Light On Off
Num
Lock The number keys in the numeric
keypad are active. The alphanumeric character keys
in the keypad area are active.
Caps
Lock The letters appear in uppercase as you
type. The Shift key lowers the case of
typed letters when Caps Lock is on. Letters appear in lower case as
you type (unless you hold down
the Shift key).
Scroll
Lock The screen scrolls differently.
(Exactly how it scrolls depends on the
specific application. It has no effect in
many applications.) Information moves across the
display normally.