1 SCALE
  Syntax: SCALE id1 [:id1n] [&idb1] id2 [:id2n] [&idb2]
          [scale]                              (default scale = 1.0)
   where: id1  is the input histogram identifiers
          idb1 is the (optional) input secondary identifiers
          id2  is the output histogram identifier
    and   idb2 is the (optional) output secondary identifier

  Scales a histogram  (`id1') by a given factor.  To specify the secondary
  identifier,  precede it by  a `&',  otherwise the  default will be used.
  (Use the `SET IDB' command to change the default). The scale factors are
  optional.  To  avoid   confusion  you  should  give a  `<CR>'  after the
  identifiers or make sure the scale factors are given as real numbers.

  To scale a range of histograms, the primary identifiers you give for the
  input  and output   histograms must  be the  same,  but you  can specify
  different secondary identifiers. For example,

  `SCALE  300:400&1 300 :  400 & 10 10.0'  will scale all  histograms with
  primary identifiers 300 to 400 and  secondary identifiers 1, by a factor
  of 10,  putting  the  results  into  histograms  with  the same  primary
  identifiers and secondary  identifier 10. If you give primary identifier
  0, the operation will be performed on all plots with the given secondary
  identifier.

