Yes, like John told you. But I can tell you that after a while you get used to it, and you don't want to live without it. However, my personal preference is the Reverse Invers option, it's much less annoying.

>>The underline means that the line is not complete or contains errors, it can not be executed.
>
>Is there a way to turn that off? As soon as I type a word, it starts highlighting.