I can't figure out how to set up my own Bill of Materials. When I try and add Mass to a column, the column stays blank. After watching a Youtube Video, I go to Summary Information found in properties and go to custom. The Youtuber says the drop down menu has a list of custom properties to choose from put in by Solidworks. I have none. Is it something I have to link up manually? Or something that got lot lost in the 2015 update (Been having problems with this)?