Dell Latitude L400 Guía De Información Del Sistema página 9

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Use a chair that provides good lower back support.
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Keep your forearms horizontal with your wrists in a neutral, comfortable position
while using the keyboard, touch pad or external mouse.
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Always use the palmrest with the keyboard or touch pad. Leave space to rest
your hands when using an external mouse.
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Let your upper arms hang naturally at your sides.
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Sit erect with your feet resting on the floor and your thighs level.
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When sitting, make sure the weight of your legs is on your feet and not on the
front of your chair seat. Adjust your chair's height or use a footrest, if necessary,
to maintain proper posture.
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Vary your work activities. Try to organize your work so that you do not have to
type for extended periods without stopping. When you stop typing, try to do
things that use both hands.
1 Computer positioned directly in front of user
2 Wrists relaxed and flat
3 Arms at desk level
Dell Latitude L400 System Information Guide 1-7