For a grid surface chart, is there a way to limit the legend range to be the range of the Y-axis (not the data)?  For example, this looks pretty weird.  It looks even worse when the data has outliers.

Hi Mark,
When the palette legend item is automatically generated it will take the surface min/max y values. In order to work around this you need to create a custom legend as shown in the following example:
All Examples \ Panels \ Legend \ Palette Item
Hope this helps – let us know if you meet any problems or have any questions.

Best Regards,
Nevron Support Team