used to display
        XREFs. Additional XREFs will not be displayed.</P>
        
        <P><B>Sort References by -</B> Allows the references to be sorted by Address or by type.
        This is most useful when <B>Group by Function</B> is off.
        
      </BLOCKQUOTE>
    </BLOCKQUOTE>

    <H2><A name="Listing_Popups"></A>Popups</H2>

    <BLOCKQUOTE>
      <P>Popups are transient windows used to display additional information about the item over
      which the mouse is hovering. There are options 