Press the Num Lock key to lock and unlock the numeric key functions:
When the Num Lock light on the keyboard is on, the numeric keys work in the same
way as the number keys and arithmetic functions found on a basic calculator.
When the Num Lock light on the keyboard is off, the numeric keys are directional keys
used to move the cursor or play games.
Each keyboard indicator is a light labeled with a name or with an icon for its status:
When lit, numeric keys are locked as number keys and
When lit, alphanumeric keys are locked to uppercase.
When lit, scroll function is locked.
Using the Keyboard