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HP Business Notebook PCs - How to Use the Blue Colored Number Keys
This document gives the method for using the blue colored number keys.
The blue colored number keys can be activated by turning on the number lock.
Turn on the number lock by holding down Fn and pressing the scroll (num lk) key. Once the number lock is activated (number lock LED will turn green), the blue number keys will be active.
To disable this feature, hold down Fn and press the scroll (num lk) key.