Page Layout ⇒ Page Order

[XLambda]

Hi everyone!

I've been using LaTeX for years, but most of the time it was short articles. Now I've started actually making some larger works, and printing them myself. In order to do that I need to change the page order so I can stack them for binding. I know there's a command for that, but I couldn't find it anywhere online... Can one of you help me out?