When entering 2D Math I occasionally like to make a character non-italic and Bold. The help files explain how to do this several different ways. The changes do appear on the screen before and after the worksheet is saved. When the worksheet is closed and opened again, the format changes are gone. It would appear that typesetting rules are taking over so what the help pages say under the topic '2D Math' is not what happens in practice. Bug? Feature? Workaround?