"Show Multilevel BOM in Flat Mode" enable to drag out the lowest level of the BOM structure, especially contains sub-BOM components.
For example,
MILO KAO KAO
- MILO Powder (Sub-BOM)
- Sugar
- Water
MILO Powder
- Coco
- Milk
If you have use "Show Multilevel BOM in Flat Mode", then the results of the BOM components will be:
MILO KAO KAO
- Coco (from MILO Powder)
- Milk (from MILO Powder)
- Sugar
- Water
NOTE: You can check the Multilevel BOM trees from this path Production | Print BOM Relation...