SET(ENABLE_RESIZE)

  Enables or disables resizing of the TPU screen.  If the second
  parameter is the keyword ON, TPU gives DECwindows hints (parameters
  that DECwindows is free to use or ignore) about the allowable maximum and
  minimum sizes for the TPU screen.  The hints are set by the SET
  (SCREEN_LIMITS,...) built-in.  If the second parameter is the keyword OFF,
  TPU uses the screen's current width and length as the maximum and
  minimum size.

  Syntax

     SET (ENABLE_RESIZE, {OFF | ON})

  Parameters

     OFF                  A keyword that disables TPU's screen resize
                          support.

     ON                   A keyword that enables TPU's screen resize
                          support.

  Example

     The following statement enables screen resizing:

     SET (ENABLE_RESIZE, ON);