The Default Buttons

  Here is an example from the list of default accelerators.
  Buttons  DefaultButtonBindings

  {
      <Btn1Down>           root    f.menu  RootMenu
      <Btn1Click2>         title   f.minimize
      Shift  <Btn1Click2>  icon    f.minimize
  }

  These items

  1.  Display the Workspace menu from the screen (or root) by
      pressing MB1 on the screen,

  2.  Minimize a window from the title by double-clicking

      MB1 on the title,

  3.  Minimize an icon from the icon box by shift double-
      clicking MB1 on an icon.