Today in my English class, I was working in a Google Doc and was bored. I double clicked on the space between pages. All of a sudden, the pages sort of "connected."

I had seen this happen on other students computers (or at least the aftermath of it) and had tried to fix it, as it messes with formatting, but had no luck. Unfortunately, it also happens with any new Google Doc I make. Has anyone had any luck reversing this? And how?