If you are a PC user, (and I don't know about Apples), you might be interested in writing only in .rft format, which can be saved into almost anything. While working up a synopsis and screen work, I had problems with Word (I use WordPerfect for manuscript work). Then I saved to .rtf, which can be picked up by almost any machine. It worked.
In today's writing world we are going to have to be flexible and use what the computer lords throw at us. For instance, I much preferred my old DOS, function keys for writing than using a mouse. Also, like other writers, I do not like page breaks in draft form. Think of one long roll of paper, per chapter. But for some reason, most software does have page breaks.