You can restructure assembly components in a BOM table without affecting the assembly structure.
You can:
- Dissolve subassemblies or weldments.
- Combine all items that are identical to a selected item, such as parts or weldments in the BOM.
- Drag items from one cell in the Assembly Structure column to another to combine like items or re-arrange the hierarchy.
- Display detailed weldment cut lists.
To restore restructured items, right-click a modified assembly item
and select
Restore Restructured Components.
Dissolving Subassemblies or Weldments
You can remove individual parent components within the indented hierarchy of a BOM while retaining child components by dissolving items in the BOM. Right-click cells in the BOM Assembly Structure column to dissolve selected subassemblies or weldments, removing them from the BOM display.
In the indented display of BOM components, right-click the first subassembly 
in the BOM Assembly Structure column and select Dissolve.
The first subassembly is dissolved. Its parts move to the bottom of the Assembly Structure column.
Combining Like Items
Right-click a cell in the BOM Assembly Structure column to combine the item in the selected cell with all identical items in the BOM.
In the indented display of BOM components, right-click a washer 
in the first subassembly, and select Combine Identical Components.
All identical washers are combined with the selected washer. Item numbers and quantities are updated.
To separate combined items, right-click a combined item and clear
Combine Identical Components.
Dragging Items to Restructure the BOM
You can combine like items or rearrange items by dragging components and subassemblies in the BOM Assembly Structure column.
You can drag:
- Weldment bodies to weldment bodies or parts
- Parts or assemblies to parts or bodies
- Parts, bodies, or assemblies to assemblies