page background and images

Hi

A thing I never done before :) (question to visual compser)

I wanna do a menupoint/site with static background (whole site the same background) and then I want to put content like images and text infront/foreground this background.

how can I do this with visual composer?

what do I have to do with the pictures? Make their background transparent, or what?

Whould be great if you can help me with this

thanks and have a funny day.

cheers

Toni