How to move any object in all pages in one firewor file at one time?

I'm making snapshots of websites designed by us. i'm using fireworks pages system. each page contains a website attached in responsive devices

Like This http://ift.tt/1wTcv0p

I have 40 pages in one fireworks file.

Now My question is to how to move all responsive devices 50px down and changes increase canvas height so that changes automatically applied to every pages .