... which could be used by Val to help elevate or even prevent her problems. Keyboard Trays Purpose: To adjust the height and angle of a keyboard in order to fit the person or allow posture change To allow a better viewing arrangement by moving the person back from the screen or worksurface Possible Drawbacks or Misuse: The mechanism reduces knee clearance For some keyboard trays, there is only enough room for a keyboard, forcing a long reach to use a mouse Keyboard trays can be adjusted too low, too high, or at the wrong angle, causing bent wrists General End-User Instructions: The purpose of this device is to adjust the height and angle of the keyboard and mouse. The best height for the keyboard is generally about at elbow height or lower, but nearly any height is acceptable if it is comfortable. The angle of the tray/keyboard is as important as its height. Adjust the tray so ...

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