When I create BOM list I would like to include some part manually, I saw youtube video of BOM option, there got a option which is Include in BOM. But I am wandering why my SW do not have this such option? My SW is 2012.

I attach a image which is print screen from internet, but not so clear sorroy about it, but at least you will understant what promble i am facing.

Thanks in advance for your help!