Old_Names:

      Some of the CLEAN parameters have kept  their  old  names:  BLC,  TRC  and
    BEAM_PATCH (which are seldom used)

      Others  have equivalent short names: ARES, FRES, GAIN, NITER for which the
    CLEAN_ prefix may be omitted.

      MAJOR, MINOR, ANGLE (which were used to control the Clean beam size)  have
    been replaced by BEAM_SIZE[3]