The Screen Editor Main Window is comprised of an
  Image/Mask Display and Edit Area, a Message Display
  Area, and a Controls Area.

  The Image/Mask Display and Edit Area displays Benchmark
  and Results images and is used to define Masks.

  The Controls Area is used to modify the contents of the
  Image/Mask Display and Edit Area.

  For more information, on the Screen Editor's Display,
  Message, and Controls, double click on an item from the
  list of additional topics below.