To reduce contrast to 75%, you can use
xrandr --output --gamma 0.75:0.75:0.75
Ok, sorry, gamma is not the same as contrast. But gamma can be used to
achieve similar shifts of the relation of dark to bright colors, so it
might be suitable to get the desired effect here.
Greets,
Kiste
Hi! I'm no real expert, but I dare to guess some answers anyway...
Will there ever be a Control Center like the Windows version ?
Probably not. It is not the job of a driver to communicate with the
user. GUIs are made by other people. Your desktop environment could
provide such a tool.
To