LG 17MB15T Owner's Manual page 6

Proper posture
The proper posture for using the product when standing
Adjust the screen so that you can comfortably look at it at a slight
downward angle from your natural eye level.
Take a break for approximately 10 minutes every hour to reduce any fatigue
caused by long-time usage.
The stand of the touch monitor allows the product to be used in the
optimum position.
Adjust the stand angle between 45 to 66(68) degrees to create the optimum
user environment.
Gaze
downward
toward the
center of the
monitor.
Always
maintain good
posture, with
your back
upright and
legs together.
A5
Stand tilt Range
45° to 66°(68°)
Adjust the location
of the Monitor set to
avoid it reflecting
light.