And to continue further with what Romanos401 says, selecting the last two and clicking to break the beams will preserve the beaming on the first two as well. I set up a shortcut for this and it works like a charm. I programmed the Key Command [cmd-B] to beam together and [option-cmd-B] (Mac), [alt-cmd-B] (Windows) to break beaming. Of course, you can define your own.
