UV_PREVIEW

        [ADVANCED\]UV_PREVIEW  [TAPER Ntaper] [CLIP Threshold]
      [HISTO Nhisto] [SMOOTH Nsmooth] [/BROWSE [Ataper]]
      [/FILE UvData.uvt [Drop]]

    A fast previewer to figure out if there is signal and what is  its  spectral
    shape.   The command attempts to find out the line free regions and to esti-
    mate a continuum region.

    The output of  UV_PREVIEW  can  be  used  for  further  processing  commands
    (UV_BASELINE and UV_FILTER, UV_SPLIT, SPECIFY, etc...)

    If  a catalog is defined (see HELP CATALOG), it will also display line iden-
    tification (red for detected ones, blue for the others).

      The behaviour is controlled by 4 parameters than can be  set  through  the
    "KEY Value" optional argument pairs. These are
      TAPER   Ntaper    : number of scale sizes  (default 4)
      CLIP    Threshold : Clipping level in Sigma (default 3.5)
      SMOOTH  Nsmooth   : Number of spectral smoothing (default 3)
      HISTO   Nhisto    : Size of histogram
    These  values are "sticky": they remain valid until further change, and they
    can be listed by
        UV_PREVIEW ?