How to Change Default Paper Setup in Pages

When I studied in Australia, I had to change the default paper size of Pages from Letter to A4. It took a bit of hunting to find out how to do it.

Turns out it's easy: 

1. Go to File > Page Setup. 
2. Click the "Paper Size" dropdown and choose A4 (or whatever default paper size you want).
3. Click the "Settings" dropdown and choose "Save as Default".

MS Word had a different way of doing this, so it made it difficult for me to find out how Pages did it. Now that I know the right way, the Word way of changing the default paper setting seems more complicated.