Changing the page layout in Open Office

I’m using Open Office and viewing my document in a print layout. All the pages were arranged vertically, until I accidentally pressed some combination of keys with my elbow. Now the pages are arranged in sort of a square. Pages 2 and 3 are side by side, in a landscape format. What did I do, and how do I fix it? I went to the Styles and Formatting tab and set things to default, and I tried ctrl + V.

ETA: It suddenly fixed itself. But knowing what I pressed and how to fix it in the future would be helpful.

Does this

seem likely to be involved? From here.

Else, Page Preview does the 2 pages side by side thing by default, looks like :

The “Page Preview” button icon didn’t copy. It looks like a search button except the magnifying glass is over the top right corner of a blank sheet of paper.

I think “CTRL + V” is just a shortcut for Paste. Comes from the Unix move file command.

Your first suggestion was correct. Thanks! I did searches for changing the layout and didn’t find anything.

Whoops, yes, I’ve been pressing ctrl + V so often that I messed up. I meant ctrl + z.