Being able to adjust my call and quickly verify the result would cut out a lot of the time for using this transformer. It would also help for using things like the XML/JSON transformers down the line. I imagine this to be in the form of a collapsible window at the base of the Transformer. I think this would also help in addressing parts of this idea: https://knowledge.safe.com/idea/55826/make-it-easier-to-work-with-jsonxml-result-from-re.html