# 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.

![](https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2Fgit-blob-e482569ca0e9e5b08835d6a1d7f36871650fd0f8%2Fmodel-tree-menu.png?alt=media)

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).

![](https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2Fgit-blob-b76ec7c69efa6481e9f8a85db41398690fe8cc07%2Fmodel-tree-attribute.png?alt=media)