I am using ArcGIS Desktop 10.3.
I often have a problem where my leader lines are overlapping other leader lines in the same layer. I do not want to convert to graphics. I understand how to stop labels overlapping other features, it is the leader lines that are the problem. I use Maplex a lot and have altered all the settings I can think of. Sometimes changing the leader tolerance makes a slight improvement but not all the time.
Here I have a long offset because some areas are very busy. All the external zones are allowed. These are currently advanced callouts but I'm having the same problem with simple ones.
Is there a setting I'm missing somewhere?