Using Mail's Main Window

  The main window lists your Mail drawers, folders, and
  messages.

  Drawers, folders, and messages are identified by unique icons.
  For example, a message is identified by an icon that looks like
  an envelope.  An icon also indicates whether the object is open
  or closed.

  Drawers and folders can be opened to reveal their contents
  and closed to conceal their contents.  To open a drawer or
  folder, double click on the name of the drawer or folder.

  Near the bottom of each pane of the main window is a row of
  push buttons.  These buttons duplicate pull-down menu items
  for tasks you most commonly perform.  Many of the push
  buttons are disabled (dimmed) when you first start Mail and
  remain disabled until you select a specific message.

  For more information about using Mail, double click on one
  of the additional topics listed below.

  Additional topics:

  *   Overview of Mail

  *   Overview of Mail

  *   Creating and Sending Messages

  *   Reading Messages

  *   Selecting Drawers, Folders and Messages

  *   Using Pop-Up Menus