Opening a Drawer in a New Window

  Choose Open Drawer In New Window from the File menu's
  Open-Close submenu to open the first selected drawer in a
  new main window.  The folders in the open drawer are listed
  below the drawer name in the new main window.

  You can perform all Mail tasks on the drawers, folders, and
  messages displayed in the new window.

  Additional topics:

  *   Overview of Mail