AltGr (also
Alt Graph,
Alt Graphic,
Alt Graphics,
Alt Car, or
Right Alt) is a
modifier key found on some
computer keyboards and is primarily used to type characters that are unusual for the locale of the
keyboard layout, such as currency symbols and accented letters. On a typical, IBM-compatible PC keyboard, the AltGr key, when present, takes the place of the right-hand
Alt key. In
OS X, the
Option key has functions similar to the AltGr key.