[GIS] How to add a field that determines the feature’s transparency in ArcMap

Question

I have a feature layer that has points. I want these points to be transparent depending on a field that I've created.

Here are references to being able to actually do this (I do understand that these are mostly tech article and a gis.se question, but somewhere someone has done this):

• http://support.esri.com/en/knowledgebase/techarticles/detail/17494
• http://support.esri.com/en/knowledgebase/techarticles/detail/21444
• Creating symbology for multiple attributes within the same feature class in ArcMap 10

So I believe this is possible, and what I've found is that under the symbology settings, the Advanced dropdown should have a Transparency option. However this is what I find:

Any ideas what I need to enable to allow this?

Answer 1

From your first link, your features must be polygon features. You have point features. You can buffer your points to create polygons from them, after which you should have the Transparency option in the Symbology-Advanced dropdown:

This option should be present in all versions of ArcGIS since 8.1.

See also this answer: Creating symbology for multiple attributes within the same feature class in ArcMap 10