It is often convenient to assign the original default value to the parameter. This `assignment' is accomplished with the command unset. For example, if the task histo had been run with inputs:

   in       = gauss
   region   =  
   range    = 0,1
   nbin     = 10
but you wanted to run histo with the default for nbin, you would type:
   histo% unset nbin
Multiple parameters can be unset on the same line. Thus, to assign both range and nbin to their default values, you would type:
   histo% unset range nbin
Then, typing:
   histo% inp
will result in miriad replying
   Task:   histo
   in       = gauss
   region   =  
   range    =  
   nbin     =

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