DBG> SHOW DISPLAY
  display SRC at H1, size = 64, dynamic
      kind = SOURCE (EXAMINE/SOURCE .%SOURCE_SCOPE\%PC)
  display INST at H1, size = 64, removed, dynamic
      kind = INSTRUCTION (EXAMINE/INSTRUCTION .0\%PC)
  display REG at RH1, size = 64, removed, dynamic, kind = REGISTER
  display OUT at S45, size = 100, dynamic, kind = OUTPUT
  display EXSUM at Q3, size = 64, dynamic, kind = DO (EXAMINE SUM)
  display PROMPT at S6, size = 64, dynamic, kind = PROGRAM
  DBG>

      The SHOW DISPLAY command lists all displays currently defined.
      In this example, they include the five predefined displays
      (SRC, INST, REG, OUT, and PROMPT), and the user-defined DO
      display EXSUM. Displays INST and REG are removed from the
      display pasteboard: the DISPLAY command must be used to display
      them on the screen.