Displays Help.
Access Methods
Menu: Help 
AutoCAD Help
Command entry: Cmd-/ or Fn-F1 (or 'help for transparent use)Summary
Executing the HELP command while a command is active displays Help for that command. You can also click the Help icon that appears on the right side of the command line when a command is active. Clicking the Help button in a dialog box displays Help for that dialog box.