Yves, to do a "classical" calibration, some graphic cards have a possibility to calibrate your monitor. Windows also gives you the possibility to calibrate (in french: click-droit sur l'ran-->propri--->paramres--->avanc-->carte. Cela doit re OPTIMAL pour la carte graphique).

You can use as well the buttons on your monitor to calibrate the classical way (CMYK).

You also can go to http://pages.prodigy.net/ecmorris/tips/monitor.htm and compare your colors (CMYK). You may need to do a personal gamma, contrast and brightness correction.

It is not easy to give special rules, all depending of the fabrik of your monitor, the surrounding light and and and...

Hope this helps.

:-)Guitta