About the Structure Tree
In Creo View, use the Structure Tree to display a hierarchical view of all components in the structure. The root structure is at the top of the Structure Tree, and its subassemblies, parts, instances and features below it.
When you click the Structure Tree, the Structure tab on the Ribbon is activated. You can use the Structure tab to select and edit elements in the Structure Tree.
The Structure Tree contains assemblies and parts that may or may not have geometry (OL files) associated with them.
If an assembly or part has associated geometry, the geometry can be
loaded or unloaded in the view. When you load geometry (OL file) in the view, it is not automatically visible, so you must
set the visibility of the part or assembly.
A structure can contain one or more references to external structure files (PVS or PVZ files). The references to the external files are branch links. For example, you can have branch links to subassemblies or parts in a positioning assembly in Windchill.
Branch links can be either Unresolved or Resolved in the tree structure, depending on whether the referenced structure has been located and its structure merged with the parent structure. Branch links are initially Unresolved until they are expanded or loaded in a view.
A Structure Tree may also contain these elements:
• Symbols that indicate a problem. For more information, see below.
• 
—Assembly or part that does not have associated geometry
• 
—Assembly or part that has associated geometry that is unloaded in the view
• 
—Assembly or part that has associated geometry that is loaded in the view
• 
—Assembly or part that has multiple instances collapsed. Only one instance is shown in the tree
• 
—Unresolved Branch Link. The reference to the external structure file is not loaded into the view, and is not visible in the Structure Tree
• 
—Resolved Branch Link. The reference to the external structure file is retrieved and loaded into the view. The corresponding substructure is visible in the Structure Tree.
• 
—Loaded assembly or part with no geometry but with a thumbnail
• 
—Loaded assembly or part that has associated geometry and a thumbnail
• 
—Unloaded assembly or part that has associated geometry and a thumbnail
• 
—Restricted viewing rights for the geometry associated with the assembly or part. The user has rejected the copyright message for that geometry so you cannot view the geometry.
• 
—Geometry associated with the assembly or part cannot be found (broken link OL file not found)
• 
—Branch link cannot be resolved
Large Structure Trees can be cumbersome and you may find it difficult to understand the meaning of the node names. To improve performance and make it easier to relate to the display, you can perform the following actions: