The SET SCREEN (abbreviated SE SC) command specifies the width of your
 terminal.

 Format: SET SCREEN w

 where w is the width of the screen line.  By default, the screen width
 is set to the terminal's width, as reported to EDT by the operating
 system.  On VT100-type terminals you can set the width to 80 or 132, and
 EDT will adjust the terminal appropriately.  On other CRT terminals you
 should only use the terminal's fixed width: 80 for VT52s and 84 for
 VK100s.