SET ALIGN

        LAS\SET ALIGN Type Range

    Defines  the  way the spectra to be averaged are aligned (Type) and com-
    bined (Range). Possible combinations are:
      Type:  C[hannel]      for spectra and drift
             V[elocity]     for spectra only
             F[requency]    for spectra only
             P[osition]     for drift only
      Range: I[ntersect] or C[omposite]
    Default is SET ALIGN C I.

    Note: the default means that continuum drifts in opposite directions are
    not properly stacked: ALIGN Position must be specified for that.