Select Merge input and output fields if you want to use the input fields to format the output. This selection is appropriate for some tasks, but not all. It is most useful for task forms in which the input data is very similar to the output. For example, if the task input is a work item, and the task output is the same work item that is being updated, you can generate much of the format for the output by merging input and output. For details, see Merging Input and Output Fields in a Task Form.