The Do-not-use Type List, located between the Source Window and the
  Views-and-Types Display, lists the routines the heap analyzer does not
  use as "segment types," the names that characterize segments.

  For example, the display showing in the Memory Map may include many
  segments labeled with the names of low-level memory management
  routines.  If you include these names in the Do-not-use Type List, the
  heap analyzer will search further for names to characterize segments,
  and each segment's purpose will become clearer.

  For information on Do-not-use Type List context-sensitive pop-up menus,
  see the additional topics below.

  For information on other heap analyzer screen locations and pop-up
  menus, click the 'On Context' menu item in the heap analyzer Help menu,
  then click the location of interest.

  For information on using the heap analyzer, see the 'On Window' menu
  item in the heap analyzer Help menu.