How do I degauss a computer CRT monitor?

Answer:

Degaussing a computer monitor can help correct and fix any visual distortions being displayed on a CRT monitor and can also often improve the overall picture being displayed on the monitor.
To degauss the monitor, open the monitor setup through the buttons found on the front of the monitor. Using the arrows or pressing the buttons multiple times will allow you to view all available options. One of the options should be degauss, the picture on the right shows what the degauss icons may look like.
Once selected, your monitor should make a loud noise and the display will appear to go distorted for a few seconds. If this occurs you've successfully degaussed your monitor.
LCD and flat panel display users
The technology used to create the picture in an LCD display, flat panel display, laptop, and any other non CRT monitor is not the same. Therefore there is no degaussing option available for these displays.