Wrapping text in a paragraph

I'm trying to simply type a paragraph in PSE 18. When I click on the type tool, I drag a box and I begin typing. In the past, it automatically wrapped and went down to the next line and I just continued typing. But now when I begin typing, it will actually go outside the box and will not continue on the next line. I believe there's a setting somewhere that says "no break" but I can't find it in Elements 18.