Context-Sensitive Help

  Context-sensitive help is information about an object in a
  window or a dialog box.

  To display context-sensitive help, choose Context-Sensitive
  Help from the Help menu.

  The pointer changes to a question mark.  Move the question
  mark to a menu, a button, or another object and click MB1.
  Help for that object appears.

  Additional topics:

  *   Overview of Mail