I have a map with many of active polygon feature class (Over 100 layers) and I need to set all polygons Outline Color to "No color". Can you please let me know how I can run an arcpy code to select all polygon layers in map and set their outlines?
This is not a parameter that can currently be modified directly via arcpy. You would have to create a layer file with the desired symbology and set your target layer to use that symbology.
