BLINKER OVERLAY THRESHOLD
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  Purpose : Set size of the smallest overlaid segments

  Syntax  : BLINKER OVERLAY THRESHOLD <nuLimit>

  Default : 32 bytes

  Example : # only overlay segments larger than 64 bytes
            BLINKER OVERLAY THRESHOLD 64

  This command sets the threshold size below which code specified to be
  overlaid will be moved back to the root section of the program.  Very
  small routines (less than 32 bytes) take up more root space when they
  are overlaid, due to overlay manager table entries, than they would if
  they were simply left in the root.

  Additionally, very small overlaid routines execute disproportionately
  slower, since the time overhead in loading / calling them may be large
  in comparison with the actual execution time of the routine. If it is
  the case that very small routines are very frequently called, the
  developer may wish to specify a threshold large enough to cause them to
  be moved back to the root, improving the performance of the program.

  Note that this command has no effect on Clipper 5.01 code overlaid
  through the paging system.