By adding rows to an existing BOM, you can add non-CAD items such as grease or adhesives. You can also account for items that are not part of the design but are required for manufacturing and shipment, such as packaging. You can create a BOM from scratch by creating a new item and building its BOM row by row without ever creating a single CAD file. When you add a new row to the BOM, you are adding a link to an existing item.
The BOM can only be edited when it is in the tree view. You cannot edit a BOM if it is displayed in the list view. Rows can only be added to the top level of the BOM. To add a row to a subassembly listed in the BOM, open the subassembly from the item master and add the row to the BOM for the subassembly.
Add a Row to a BOM
Or
Right-click a row in the BOM, and then select Add New Row from the context menu.