Margins help!?

Hello!

I’m using Scrivener for Windows. I want the page setup i.e. margins and so on to be the same for all my chapters and subchapters but It’s nearly different for all. I selected everything in the binder and went into file>page setup and changed to A4(cause these are the margins that I want) but nothing happens.

I just want it to be the same for all my documents: same margins, same indent, same page setup, just like in word. How do I do this?