Having written a speech in open office, amended and tweaked it over the past week always saving changes under the file name in documents odt form, I then wanted to change the type face to make it easier to read when I gave the speech. I highlighted the whole document (less than three pages) and went to change the font size when the whole thing disappeared. I panicked and immediately started trying to rewrite the major points on the blank screen while they were still in my mind. To my horror this went into the same file and now I cannot get the original back. Any suggestions?