Sony PCG-XG28 Primary User Manual page 18

a neutral, comfortable position while using the keyboard, touchpad,
or external mouse. Let your upper arms hang naturally at your sides.
Take breaks during sessions with your computer. Excessive use of the
computer may strain muscles or tendons.
Furniture and posture – Sit in a chair with good back support and
armrests. Adjust the level of the chair so your feet are flat on the floor.
A footrest may make you more comfortable. Sit in a relaxed, upright
posture and avoid slouching forward or leaning far backward.
Viewing angle of the computer's display – Use the display's tilting
feature to find the best position. You can reduce eye strain and muscle
fatigue by adjusting the tilt of the display to the proper position.
Adjust the brightness setting of the display also.
Lighting – Choose a location where windows and lights do not create
glare and reflection on the display. Use indirect lighting to avoid
bright spots on the display. You can also purchase accessories for
your display that help reduce glare. Proper lighting adds to your
comfort and work effectiveness.
Placement of an external display – When using an external display,
set the display at a comfortable viewing distance. Make sure the
display screen is at eye level or slightly lower when you are sitting in
front of the monitor.
Do not place your computer in a location subject to:
Heat sources, such as radiators or air ducts
Direct sunlight
Excessive dust
Moisture or rain
Mechanical vibration or shock
Strong magnets or speakers that are not magnetically shielded
Ambient temperature of more than 95º F (35º C) or less than 18º F
(10º C)
High humidity
Do not place electronic equipment near your computer. The
computer's electromagnetic field may cause a malfunction.