what is osd

An on-screen display (OSD) is a feature of some electronic devices that allows the user to control various settings of the display through text menus that are shown on the screen. OSDs are commonly used by modern television sets, VCRs, DVD players, computer monitors, mobile devices, and other displays to display information such as volume, channel, time, and to enable users to select viewing options and adjust components of the display, such as brightness, contrast, and horizontal and vertical positioning. OSDs can usually be accessed by pressing a dedicated button on the remote control or the device itself. OSD technology works by using a tiny camera to take a picture of whats on the screen, and the image is then sent to a software program that changes the color of the image based on what key or button the user is pressing. Depending on the manufacturer, some OSDs include more useful functions than others.