i do believe u can do that by selecting bold from the font editor ...... type /font and then u can select any type of font and the style u wish to use from that menu ... u can set it as defualt or whatnot ........
i'm gonna guess you dont just mean ctrl+B , but as for italics, many ppl have posted about that... use the search here, all posts, all forums (altho i think most are in features area) with italics as the search word