If you set this option to true, TinyMCE will force BR elements on newlines instead of inserting paragraphs. This option is set to false by default since paragraphs is a much better concept. You can style P elements to be one row by adding p { margin: 0px; padding: 0px; } to your CSS, P tags where invented for a reason and should be used. BR elements should only be used when you realy have to (mostly never).