Context-sensitive help is information about an area or object in a
  window or a dialog box.
  To display context-sensitive help:
  1.  Choose On Context from the Help menu in the heap analyzer screen.
      The pointer shape changes to a question mark (?).
  2.  Place the question mark on an object or area in a heap analyzer
      window or dialog box.
  3.  Click on MB1.  Help for that area or object is displayed in a Help
      window.  Additional Topics provide task-oriented discussions, where
      applicable.
  To display context-sensitive help for a dialog box, you can also click
  on the Help button in the dialog box.