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78 Appendix B Safety, Use, and Care Information
Chair
An adjustable chair that provides firm, comfortable support is best. Adjust the height
of the chair so your thighs are horizontal and your feet flat on the floor. The back of the
chair should support your lower back (lumbar region). Follow the manufacturer’s
instructions for adjusting the backrest to fit your body properly.
You may have to use a desk with a keyboard tray that’s lower than the work surface or
raise your chair so that your forearms and hands are at the proper angle to the
keyboard. If this makes it impossible to rest your feet flat on the floor, you can use a
footrest with adjustable height and tilt to make up for any gap between the floor and
your feet. You can also lower the desktop to eliminate the need for a footrest.
Thighs tilted
slightly
Shoulders
relaxed
Screen positioned to
avoid reflected glare
Forearms and
hands in a
straight line
Forearms level
or tilted slightly
Lower back
supported
Feet flat on the floor
or on a footrest
Top of the screen at or
slightly below eye level
(You may need to adjust
the height of your display
by raising or lowering
your work surface.)
Clearance under
work surface
45–70 cm (18–28 in.)
LL3734M40.book Page 78 Thursday, July 6, 2006 3:45 PM