I am typing a manuscript for a mathematician and sometimes I need to combine some diacritical marks with Greek letters. Since Insert/Symbols has a nice long list of appropriate "marks", it appeared that this was not a bizaar request; however, I can't find anything that is explicit on how to use them. I have found things that talk about dead keys and hex codes, but the symbols table doesn't give the hex (decimal) codes, even though it says it does, I don't think there are letters on the 10-key pad. I am more than slightly frustrated.