HP Pavilion N3210 Setup Manual page 41

When possible, use a program that has a simple user interface, such as easily
identifiable icons and pull-down menus. Also, screen information should be displayed
in a structured and well-organized way.
Monitor Use Specifications
When viewing your monitor, your head should not be tilted more than 15 degrees
forward.
You should not have to look up more than 5 degrees above horizontal or down more
than 30 degrees below horizontal for normal work tasks, such as typing or reading.
Document Holders
When keying in data from a hardcopy document, placing it in a document holder rather
than on a flat surface will make it easier to read. The following recommendations should
be observed when using a document holder:
The document holder should be at approximately the same height and distance from
your eyes as the screen, and as close to the monitor as possible to prevent neck
twisting. Some users prefer a document holder mounted to the monitor while others
prefer the document holder positioned between the screen and keyboard.
If the primary task is to view documents rather than using the monitor, the document
holder may be placed directly in front of the keyboard with the monitor slightly to the
side.
To help reduce stress on your neck and prevent eye fatigue, try to minimize the
movement of your head and eyes while using a document holder.
Your HP Keyboard
The proper positioning and use of your HP keyboard is important when using HP
computing equipment. Be sure to observe the following recommendations to optimize
your comfort and safety:
Using Your HP Notebook PC
Working in Comfort
Setup Guide 41