Only 20 rows show up at a time

I'm using Excel 2013 on a Windows 8.1 laptop.

I have a spreadsheet that's 60 rows down.

However, I must have hit some hot key by mistake or something.

All of a sudden, only 20 rows are viewable, I have to scroll down and the next 20 rows pop up. It's really irritating. lol

How can I get all the rows to show up like Excel normally displays?

Thanks in advance to anyone who can help in any way.

Did you by chance hit Freeze Panes

Gosh, I don't know. Where is that located?

When I zoom out, it looks as though its separating the spreadsheet, 20 rows per page, but when I print it, it prints fine on one page.

I just found the Freeze Pane control on the View Tab. It's greyed out so I can't select anything from it.

I might have been. How do I go about resetting the mouse settings?

Ha, I just figured it out.

On the View tab, I just hit "Normal" for the workbook view. I must have selected Page Layout somehow.

Thanks to everyone who replied in this thread!