This area shows further information corresponding to the items in the
  data structure display.  The line corresponding to each node in the
  data structure display shows the file name and line number of the
  declaration of the object represented by the node.  Lines further
  indented correspond to fields within an object.  Lines with an icon
  on the left correspond to record structures, which may be expanded or
  collapsed by double clicking on the icon.  Double clicking elsewhere
  on any of the lines in this pane will cause SCA to goto source to the
  item on that line.