The option key is a keyboard key found on Apple computers. It is used as a to create special characters and as a modifier for other command codes. As can be seen in the picture to the right, the option key is found next to the control and command keys. Since the mid-1990s, this key has included the small text "alt" on it.
Tip: For users who are more familiar with the PC, the option key is very similar to Alt key on their keyboards.