Brightness and Contrast adjustment
By pressing the right hand side or the left hand side of keys 8 (brightness) or 9 (contrast). You can adjust the screen image. The pictures show how the image is affected.
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IBM recommends that the contrast is adjusted so that white text on a dark background does not appear to “bloom”. (The edges of the characters should remain sharp).
For ergonomic reasons it is recommended that the contrast is not adjusted to maximum.
Disabling the controls
Some users may wish to disable the monitor controls to prevent tampering.
To disable the controls, press and hold down the right hand side of Key 1 where you see the following symbol:
Hold the button for 15 seconds. After 15 seconds, the screen and LED will both flash to indicate that the keypad has been disabled. If you wish to
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