You have to click on "Source" and add a <br /> where you want the line to break
first line<br />
second line<br />
third line<br />
fourth line<br />
After the 5th line it will not break any further it will just run together. A great way to put more than one item on a single line is to separate them with bars (just above the Enter key).
I was just looking for that info, thanks.