1.DBG> SHOW MARGINS
      left margin: 1 , right margin: 255
      DBG> TYPE 14
      module FORARRAY
         14:        DIMENSION IARRAY(4:5,5), VECTOR(10), I3D(3,3,4)
      DBG>

      This example displays the default margin settings for a line of
      source code (1 and 255).

    2.DBG> SET MARGINS 39
      DBG> SHOW MARGINS
      left margin: 1 , right margin: 39
      DBG> TYPE 14
      module FORARRAY
         14:        DIMENSION IARRAY(4:5,5), VECTOR
      DBG>

      This example shows how the display of a line of source code
      changes when you change the right margin setting from 255 to
      39.

    3.DBG> SET MARGINS 10:45
      DBG> SHOW MARGINS
      left margin: 10 , right margin: 45
      DBG> TYPE 14
      module FORARRAY
         14: IMENSION IARRAY(4:5,5), VECTOR(10),
      DBG>

      This example shows the display of the same line of source code
      after both margins are changed.

    4.DBG> SET MARGINS :100
      DBG> SHOW MARGINS
      left margin: 10 , right margin: 100
      DBG>

      This example shows how to change the right margin setting while
      retaining the previous left margin setting.

    5.DBG> SET MARGINS 5:
      DBG> SHOW MARGINS
      left margin: 5 , right margin: 100
      DBG>

      This example shows how to change the left margin setting while
      retaining the previous right margin setting.