Context-sensitive help is information about a part of
  an application window or dialog box that you identify
  using the location pointer.

  You can get context-sensitive help in two ways:

  -  Choose On Context from the application's Help
     menu. The shape of the mouse pointer changes to a
     question mark. Move the pointer to the area of the
     application window or dialog box about which you
     want help and click MB1.

  -  Move the mouse pointer or use the keyboard to get
     to the area of the application window or dialog box
     about which you want help; then press the Help key.

  Sometimes you will see information about only the
  particular field, button, or whatever the pointer
  is on. At other times you will see information about
  several screen objects. Each application determines
  how its windows and dialog boxes are divided into help
  regions, as well as what information is provided for
  each region when a request for context-sensitive help
  is made.