Computer monitor level sight, away from the eyes 12-18 inches (if flat) away from the eyes 18-24 inches (old ถ้าจอ)
don't lift the shoulder while typing. Adjust the seat type 100-100 degrees
thereof perpendicular to the body.Key board level mounted. Not in my drawer
the hips and legs must be perpendicular to each other. The height of the chair must fit
have put one foot when working for a long time. To prevent the feet float
.Work no more than 1-2 hours, should you change position for at least 5-10 minutes.
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