The `nvidia-settings` utility is a tool for configuring the NVIDIA XFree86/X.org graphics driver. It operates by communicating with the NVIDIA X driver, querying and updating state as appropriate. This communication is done with the NV-CONTROL X extension. Values such as brightness and gamma, XVideo attributes, temperature, and OpenGL settings can be queried and configured via nvidia-settings. WWW: http://www.nvidia.com/object/unix.html