Break row

Hi I downloaded the newest version and Im just thinking of the rowbreak
I'm woundering where I can find the document to change so that it doesent
make a new <p> tag when I press Enter, want it to be a <br> instead l
like I suppose it's here =)

And yes I found the piece of code where you have <p> at Enter
and <br> at ShiftEnter. but if I change the 2 of them nothing happens.
so just woundering what Im doing wrong, if Im missing something.