How can I get a solid body in the feature manager ?

Hi,

Some days ago, I got some problem, to mirror a part : I began to mirror with features, and to get something, I had to erase all, and to mirror with bodies.

Now, I would mirror a body, but there are only features, into the feature manager, and yet, there is a solid on my screen !!!

So how can I get a solid1, or solid5, or solid117, if SW wants to dub it like that, but some solid body in this FM ?

Tx for your help.

SolidworksParts And Features