Dell Latitude L400 - Manual (Page 7)

support.dell.com Dell Latitude L400 System Information Guide 1-5
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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