Word page layout

[tommurray]

I'm sure the answer is obvious but I cannot for the life of me figure this out: Can someone please tell me how to restore my word document to seeing just one page at a time and NOT the 2 that are now laid out, side by side? I somehow swiped my touchpad at the wrong time/place and suddenly the page I was reviewing was joined by the second page, played out to its right, horizontally. And now ALL my Word docs are laid out this way!!! Hate it!!! Would greatly appreciate idiot-proof guidance on how to not only restore traditional layout of documents, but also how I can insure this NEVER happens again! Thanks!!