My answer assumes we are talking about lightweight trees...
Does Contact have a parent BO? You will need to set up the tree using the parent in order to see the 1st level in the hierarchy.
Then in the Contact BO Attributes tab, select your pigs ears and make sure that the Display Attributes property is set the way you want it. I know what you're thinking, "But Jon, that's only the default for a when a form/query is created." Not true. It's also how AIM determines what to use below the 1st level in the hierarchy.
Also, if you plan to use drag/drop and you use the parent BO to expose the 1st level, there is a gotcha you need to know about: https://forum.awareim.com/d/9957>
And if you change the relationship between the parent/child BOs to peer as per above, you will need to add a deletion rule to maintain orphan protection: https://forum.awareim.com/d/10008>
Hope that helped.
