The goal is to style a polygon layer using graduated colors, something like
-9999 < value < 0 --> some color 0 =< value < 0.1 --> some other color 0.1 =< value 0.2 --> some other color
However, for some reason the number of classes is grayed out.
and when I click on classify:
classes is still grayed out.
ArcMap 10.5, the datalayer is using a join of a shapefile and csv table.
Number of classes is 7 and colors are custom (cannot be generated by colorbar).