On screen displays vary between monitors, but most include the basic brightness and contrast controls. Some include more advanced color controls, allowing you to calibrate individual red, green, and blue (RGB) settings. Many monitors also support positioning adjustments, which can be used to make slight modifications to the position and tilt of the screen. Monitors that include built-in speakers may include audio adjustments as well.
Most CRT and flat screen monitors, such as LCD and LED displays, include OSDs. However, flat screen displays typically have less adjustment options since their screen position is more consistent than older CRT monitors. Some newer monitors also allow users to make adjustments through a software interface rather than using the standard on screen display. Regardless of what monitor you have, it is good to be familiar with the OSD so you know how to adjust the display settings.