About Trees on Forms
Some forms include an area that displays information in a tree structure, for easier comprehension. The tree contains nodes that open other forms where you can find additional information about the selected record.
For example, you might have an item in inventory at several warehouses. The tree could have a node for each warehouse where the item exists. Under each warehouse node, you could have another set of nodes for each location in that warehouse where the item exists.
You can right-click on any of these nodes to open a form to see additional information specific to that record and that node.