User manual

Care, Use, and Safety Information 85
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 raise your chair so 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. Or
you may lower the desktop to eliminate the need for a footrest. Another option is to use a
desk with a keyboard tray that’s lower than the regular work surface.
External mouse
If you use an external mouse, position the mouse at the same height as your keyboard and
within a comfortable reach.
Built-in display
Adjust the angle of the display to minimize glare and reflections from overhead lights
and windows. Do not force the display if you meet resistance. The display is not meant to
open past 140 degrees.
You can adjust the brightness of the screen when you take the computer from one work
location to another, or if the lighting in your work area changes.
For more information
Go to www.apple.com/about/ergonomics.
LL2222.Book Page 85 Friday, December 13, 2002 12:11 PM