Changing How a Computed BOM Hierarchy Displays In the View (left) section of the BOM toolbar, expand the BOM View flyout and select one of the following: Indented Parts and subassemblies are indented from their parent assemblies in this hierarchical view (default). Parts Only Only parts are listed in the BOM in a flat view. Quantities for parts referenced by more than one subassembly are accumulated. Top Level Only Only top level entries in the BOM list are displayed. Parent topicDisplaying a Computed BOM