To Add a Viewable to a Structure
1. Click Tools > Edit Structure or Structure > Edit Structure.
2. Select a node and then click Create Child Part. The Create Child Part dialog box opens.
3. Type a name for the new node, and click OK. An empty node is added.
4. Select the empty node, and click Add Viewable. The Open File dialog box opens.
5. Browse to and select a file, and then click Open. The viewable is added to the model.
6. Click Close Edit.