# Model Tree

The Model Tree provides a way to view the topological hierarchy of your FormIt model.

Enable the Model Tree by going to the Window menu, and checking the box next to Model Tree.

![](/files/-MlG7ukXjYgChXPPkGgO)

Inside the Model Tree, each Group is identified as a History, since each Group has its own command history, or Undo/Redo stack.

Within each History, you'll see a list of nested Groups, instances, or geometric objects like bodies.

You can also view non-geometric attributes (string attributes) attached to FormIt objects using the Model Tree. [You can place string attributes on Groups created by the SendToFormIt node using Dynamo](https://formit.autodesk.com/page/formit-dynamo#dynamo-formit-nodes).

![](/files/-MlG7uk_O-8Xjf0A8Npd)


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