Apple M7698LL User Guide - Page 33

How do I work comfortably? Keyboard and trackpad When you use the keyboard and trackpad, your shoulders should be relaxed. Your upper arm and forearm should form an angle that is slightly greater than a right angle, with your wrist and hand in roughly a straight line. Use a light touch when typing or using the trackpad and keep your hands and fingers relaxed. Avoid rolling your thumbs under your palms. This Not this Change hand positions often to avoid fatigue. Some computer users may develop discomfort in their hands, wrists, or arms after intensive This Not this work without breaks. If you begin to develop chronic pain or discomfort in your hands, wrists, or arms, consult a qualified health specialist. 32