Apple Mac Pro (Early 2008) - Manual (Page 101)

Chapter 6 Last, but Not Least 101
 Position the display to minimize glare and reflections on the screen from overhead
lights and nearby windows.
More information about ergonomics is available on the web:
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.)
www.apple.com/about/ergonomics