Share Email Facebook Twitter LinkedIn CLASSICKEYS (System Variable) 2013-04-10 Product Documentation Intermediate View Original Sets the behavior of several control keys between DOS and Windows standards. 0 Ctrl+C cancels the command in progress, and Ctrl+V cycles the current viewport. 1 Ctrl+C copies selected objects to the Clipboard, Ctrl+V pastes objects from the Clipboard, and Ctrl+R cycles the current viewport. Related References Commands for Customizing the Drawing Environment Related Concepts About Keytips and Access Keys