You can specify a query by indicating the usage of a symbol in the
  source code.  SCA restricts query occurrences to those that match the
  specified symbol usage.

  Click on this button to activate this selection.  Choose a usage
  attribute from the Selection box by clicking on the name of a usage
  attribute (for example, Declaration).  Leave the Query Options button
  set to Any.  SCA displays the selected item in the Selected box,
  indicating that it will find all occurrences with that usage.