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When you create or edit a transform, the data grid displays a preview of results of the transform. Transform previews


 assist in specifying and validating the transformation steps before they are applied. 

Although final results may not be exactly represented, a preview gives a good indication of the changes. When you review a preview, keep the following in mind: 

  • Previewed columns cannot be filtered or hidden.
  • You cannot rename or change the data type of a previewed column until you add the change to your recipe.
  • Selection of column headers is disabled.