The key concepts of the new display functionality are display options, display option groups, and display operations.

• A display option is a variable that is assigned a value (or a setting) from a predefined list. Every option has a default value associated with it, and is therefore always defined.
• A display option group is the complete set of all options' values.
• A display operation is an action such as displaying or printing an image. Every operation requires an option group whose identifier is passed as a parameter to the function that performs the operation. This group affects the result of the operation and the way in which it is achieved.