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create layer with multiple categories and layering transparency

Question asked by deleted-user-ugCMpXci8bn5 on Jun 20, 2014
Latest reply on Jun 23, 2014 by cpoynter
I am trying to make a 'faux' heat map, by using graduated symbols that also have some transparency, so that when they are layered (especially at small-scale views), the layering of the symbols gives a darkened color effect.

I can do this by creating a separate layer for every symbol category, but I would like to do this within a single layer, using categorized symbols (it is a point layer).  Is this possible? I have seen some ideas about setting transparency for different symbol levels using field calculator, but this still doesn't give the effect I am looking for when symbols within the same layer are stacked.

I hope I am explaining this well, thanks for any help!