Assembly Design > Using Assembly > References and Dependencies > Reference Control > To Display Reference Backups in the Model Tree
  
To Display Reference Backups in the Model Tree
1. In an open assembly, click in the Model Tree and then Tree Filters. The Model Tree Items dialog box opens.
2. Click Copied references from the Display column.
3. Click OK. Reference (geometry) backups appear as a Copy Geometry feature sub-node in the Model Tree.