Surface flatterning

Hello, I am using SW 2015. I have an assembly consists of a few parts. I want to make a label for the curved surface of some parts of an assembly (e.g. making a label sheet for the front cover of a sport car). It seems that the new feature called surface flattering can be used for my case.  However, I cannot find this new 2015 feature. From videos found on the web, it seems that this feature is available only in Part files. Am I right? How can I make a label for curved surface? Thanks.@

SolidworksParts And Features