I've been using Data Explorer now for a couple of weeks and I've only just discovered the menu after clicking in the corner and on column headings.
Not realising this UI was present I ended up teaching myself the M code to promote rows to headers and unpivot months. I'm quite happy as I've built up some knowledge of M.
Other users who are less technical will shy away from DE if they don't find this descreet UI.
I reccommend you make the UI more visible.
Thanks for the suggestion. We are aware of this issue and we are actively working on UI discoverability.
Peter Q. http://blogs.msdn.com/peter_qian
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