Symmetry on SW composer

Hello.

 

I have a gateway, on one side of this gateway I have a relatively complex installation. I would like to symmetrical it so that I have the same one on the other side of the bridge.

A little help please. 

Hello

A short tutorial and some explanations here:

http://blogs.solidworks.com/tech/2014/08/solidworks-composer-tip-mirroring-parts-in-composer.html

 

it works well! Thank you