Do you have a negative indent set? Choose Format - Paragraph. My indentation
settings are both 0. What are your indentation settings?
Mind you, they don't *have* to be 0, and sometimes a negative indentation is
precisely what you want (in some kinds of publishing & reports). But, if
you're having a _problem_ with lines extending too far to the left, then it
sounds like your indentation settings might be the problem.