Thanks, Mansour, I was not aware of that. So the secret is just select one and then copy it, and all the changes will then affect them all?
Not really, it's not copy and paste.
what you are doing is selecting one element and then applying changes to same elements in same time globally.
Have look at this image:
http://www.feizsite.com/CoffeeCup/rlm/ASG/globally.png