Hi!

This might be a pretty basic question, but here it goes:
I have an assembly of a leg of a chair, and its constructed by 3 sheet metal parts. 
How can I make drawings of the parts in unfolded state? 

This was pretty straightforward when I was making a similar structure as a multibody part (Select drawing view ->Select bodies in property manager -> tick "Flat pattern" in the orientation), but I cant find the solution to how to do it when the different parts are a part of an assembly. 

Thanks in advance!