It allows you to alter the monitor's gamma correction of the & X-Server;. But that's not all to do. For good results you have to set the correct brightness, contrast and color balance of your monitor. This may be difficult and you have to repeat every step several times. For perfect results you need really good (and expensive) hardware.
O & kgamma; permite alterar a corrección gama do monitor do & X- Server;. Mais iso non é todo. Para bons resultados hai qeu configurar correctamente o brillo, o contraste e o balance de cores do monitor. Isto pode ser difícil e hai que repetir cada paso varias veces. Para resultados perfectos requírese un hardware realmente bon (e caro).