"Do Not Summarize" missing from scatter graph

Have you put the same field you put in 'X axis' in your 'Details' section of the scatter graph?  I agree that it would be preferable to do scatter plots how Excel has done them for the last 10 years, but this workaround works for me.

Not only that, but I can now choose the aggregation level, e.g. I can round my X value down to an integer, and use that for the 'details'.  Now many X values are amalgamated to a single point, but if I set the X axis to 'average of ...' then it shows in the correct location, not at the rounded down location.  This helps the tradeoff between seeing all your data, and getting a dense cloud of points when you have thousands of data points.